When John read 7 and 1/2 pages in 2/5 of an hour, the rate in pages per hour that he read is 18.75 per pages.
What is rate?It should be noted that rate is used to show the comparison between two things.
In this case, John read 7 and 1/2 pages in 2/5 of an hour.
The number of pages read per hour will be the division of the values given. This will be:
= 7 1/2 ÷ 2/5
= 7.5 / 0.4
= 18.75 pages
The pages is 18.75 pages.
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Solve these using the balance method show steps of working out pls I’ll brainlist/5star it’s urgent!!!!!!
1) 5x - 4 = 31
2) 7(x+5) = 49
3) 3x + 7 = -2x + 22
4) x+8 = 6
3
Add the proper constant to the binomial so that the resulting trinomial is a perfect square. Then factor the trinomial.
n-18n+
We need to add 81 as the constant term to the binomial (n² - 18n) so that the resulting trinomial is a perfect square, and factorization of that resulting trinomial will be (n - 9).
As per the question statement, we are provided with a binomial (n² - 18n),
And we are required to add a proper constant to the above mentioned binomial so that the resulting trinomial is a perfect square, and then factorise the resulting trinomial.
To answer question, first we need to know the standard form of expanding a perfect square into a trinomial, which goes as,
[(a - b)² = {(a)² + (b)² - (2 * a * b)]
Here, if we compare our concerned binomial (n² - 18n), or, [(n)² - (2 * n * 9)], with the above mentioned standard expansion of a perfect square into a trinomial, we get, (a = n) and (b = 9), and the (b²) term is missing.
Adding [(b²) = (9²) = 81] which is a constant term, to our concerned binomial (n² - 18n), we get, (n² - 18n + 81),
Or, [(n)² + (9)² + (2 * n * 9)],
Which is a trinomial and matches with the standard expansion of a perfect square into a trinomial, and hence,
[(n² - 18n + 81) = (n - 9)²]
That is, we need to add 81 as the constant term to the binomial (n² - 18n) so that the resulting trinomial is a perfect square, and factorization of that resulting trinomial will be (n - 9).
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a circle is always sometimes or never similar to the other circle because we can always sometimes or never map one onto the other using dilations and rigid transformations
Answer: always, always
Step-by-step explanation:
Every circle is similar to every other circle.
a four-digit number uses each of the digits 1, 2, 3, and 4 exactly once. what is the probability that the number is a multiple of 4? express your answer as a common fraction.
The probability that the number is a multiple of four is 0.25.
we know that if a number is multiple of four then its last 2 digits must be divisible by four.( i.e. ten's and one's places)
We are given only four numbers 1,2,3,4 , which can't be repeated.
So here , in this case , such numbers with last two digits divisible by four are 12,24 and 32 only
Having last two digits ‘12’ ;
the first two digits can be formed using 3 and 4 only . This can be done in (2!) = 2 ways.
Similar case will be happening with 24 and 32 as well.
So the total ways of getting a multiple of four will be = 2 + 2 + 2
= 6 ways
Now total numbers that can be made from given four digits = [tex]P_{4} ^{4}[/tex]
= 24
So the probability of getting a multiple of four is = 6/ 24
= 0.25
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What is the slope of the line passing through the points A(−2,5) and B(1,10)
Answer:
Slope is equal to the change in y y over the change in x x, or rise over run. m = change in y change in x m = change in y change in x. The change in x x is equal to the difference in x-coordinates (also called run ), and the change in y y is equal to the difference in y-coordinates (also called rise ). m = y2 −y1 x2 −x1 m = y 2 - y 1 x 2 - x 1.
represent the following expressions as a power of the number a (a≠0) (a^-1xa^-2)^-3
The solution of the exponential expression will be a⁹.
What is an exponential expression?Powers can simply be expressed in concise form using exponential expressions. The exponent shows how many times the base has been multiplied.
Given exponential expression is (a⁻¹ x a⁻²)⁻³. The expression will be solved as below,
E = (a⁻¹ x a⁻²)⁻³
The base is the same and the variables are in multiplication with powers then the powers will be added,
E = (a⁻³)⁻³
E = a⁹
Therefore, the solution of the exponential expression will be a⁹.
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help meeeeeeeeeeeeeee pleaseee
The vertex of the curve will be at (-2, -4) and the axis of symmetry is at -2
How to illustrate tye information?From the graph, the roots of the equation are -4 and 0, therefore, (x + 4) is a factor and x is also a a factor.
The equation of the curve is the product of the factors of the curve which is y = x(x + 4)
y = + 4x
The x coordinate of the vertex =
will be illustrated as:
-b/2a = axis of symmetry
a and b is the coefficient of x
so a = 1, b = 4
x coordinate of vertex = -4/2 = -2
Then, substitute x = -2 into y = + 4x to find the y-coordinate of the vertex
y = (-2)² + 4(-2)
y = 4 -8
y = -4
vertex = (-2, -4)
The axis of symmetry is -b/2a which is -2
Therefore, the vertex is at (-2, -4).
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If you are standing 23 m for a tree and the angle of elevation from where your standing is 35° what is the height of the tree?
Step-by-step explanation:
angLe of elevation= 35°distance from the tree=23mtantither= opp/adj opp=heightadj= 23mtither=35°tan 35=H/230.7002=H/23H=23×0.7002H=16.10mPLEASE HELP GIVING 75 POINTS!!
184) If 15
Elliot makes and sells key chains. His profit depends on what price he charges for a
key chain.
He writes the expression (x - 10) (60 - 3x) to represent his profit based on the
price per key chain, x.
Enter Elliot's average change in profit for two different sections of the graph.
When charging $15 for a key chain, it is discovered that his maximum profit is $75 using the vertex of the quadratic function.
The vertex of a quadratic equation,
A quadratic equation is given by, [tex]ax^{2} +bx +c[/tex]
The vertex is given by [tex]A (x_{1} ,y_{1} )[/tex]
[tex]x_{1} = \frac{-b}{2a}\\ \\y_{1} = \frac{-b^{2} +4ac }{4a}[/tex]
Considering the coefficient a, we have that:
If a < 0, the vertex is a maximum point.
If a > 0, it will be a minimum point.
The function given is (x -10 ) (60 -3x)
f(x) = (x -10 ) (60 -3x) = 60x -3[tex]x^{2}[/tex] -600 +30x = -3[tex]x^{2}[/tex] +90x -600
So, here a = -3, b = 90 and c = -600
So,
[tex]x_{1} = \frac{-b}{2a}\\ \\x_{1} = \frac{-90}{2*(-3)} = 15[/tex]
[tex]y_{1} = \frac{-b^{2} +4ac }{4a} = \frac{(-90)^{2} + 4*(-3)*(-600) }{4*(-3)} = 75[/tex]
Hence, He can make up to $75 in profit when he charges $15 for a key chain.
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The mass of 1cm³. of copper is 8.5 grams. Correct to 1.d.p. Complete statement about total mass, T, grams of 12cm³. of copper.
There are 102 grams of copper in 12 cm³ of copper.
What are unit rate?A unit rate means a rate for one of something.
Given that 1 cm³ of copper have mass of 8.5 grams
Therefore, 12 cm³ = 12*8.5 = 102 grams
Hence, There are 102 grams of copper in 12 cm³ of copper.
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Decide if each question is statistical or nonstatistical.
How many hours did Rahul sleep last night?
What is your favorite sport?
What is Noya’s favorite book?
How far away do you live from your school?
Based on the information illustrated, the analysis implies the following:
a. nonstatistical.
b. statistical.
c. nonstatistical
d. statistical
What is a statistical question?A statistical question is one that can be answered by collecting varying amounts of data. A statistical question is one that does not have a single answer. Instead, you should expect a range of responses.
Identifying a statistical question necessitates knowledge of statistics. Statistics is a mathematical study that involves the collection, analysis, and interpretation of changing data. A statistical question will ask a question with a variable answer; data must be collected and analyzed, and the answer will provide an explanation of the information.
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statistical or nonstatistical What's the difference? is that statistical is of or pertaining to statistics while nonstatistical is not statistical.
Statistical sampling is more objective and uses probability to determine the appropriate sample size. While it is does not eliminate sampling risk, statistical sampling allows the auditor to measure sampling risk and take steps to control it. Nonstatistical sampling relies more on the auditor's judgment.
Thus, the correct answer is nonstatistical statistical nonstatistical statistical
What is the y-intercept of the function y = log4 (2x+64) +3?
Answer:
(0, 6)
Step-by-step explanation:
Given function:
[tex]y=\log_4(2x+64)+3[/tex]
The y-intercept of a function is the point at which the curve crosses the y-axis, so when x = 0.
Therefore, to find the y-intercept, substitute x = 0 into the function:
[tex]\implies y=\log_4(2(0)+64)+3[/tex]
[tex]\implies y=\log_4(64)+3[/tex]
Rewrite 64 as 4³:
[tex]\implies y=\log_4(4)^3+3[/tex]
[tex]\textsf{Apply the log power law}: \quad \log_ax^n=n\log_ax[/tex]
[tex]\implies y=3\log_4(4)+3[/tex]
[tex]\textsf{Apply log law}: \quad \log_aa=1[/tex]
[tex]\implies y=3(1)+3[/tex]
[tex]\implies y=3+3[/tex]
[tex]\implies y=6[/tex]
Therefore, the y-intercept of the given function is (0, 6).
please help me out. i’ll give brainliest
Answer:
y = -2x + 1
Step-by-step explanation:
y = mx + b you must find the m (slope) and the b (y intercept) to write the equation for the graph.
The slope is negative. If you start on the very left side of the graph and follow it, you will see that it goes in a down hill direction. That means that the slope is negative. If I start on the very left and the line goes up from there, the slope is positive. If the line is a straight horizontal line, then the slope is zero, it does not go up or down.
The slope is -2. Select one of the dots and travel to the next dot, but you can only move horizonaly and vertically. You cannot move diagonally. You will notice that the two closes dots are two units up (or down) and only 1 unit left (or right) depending on which dot you start at. Since you move 2 units up and 1 unit left that is a slope of 2. 2/1 = 2.
The b (y-intercept) is just where you see the line cross the y axis. It crosses it at 1.
Answer:
y = -2x + 1
Step-by-step explanation:
Slope intercept form: y= mx + bHere m is the slope and b is y-intercept.
Pick any two points on the line.
(-1,3) & (2,-3).
Find the Slope.
[tex]\sf \boxed{Slope =\dfrac{y_2-y_1}{x_2-x_1}}[/tex]
[tex]\sf = \dfrac{-3-3}{2-[-1]}\\\\=\dfrac{-6}{2+1}\\\\=\dfrac{-6}{3}\\\\=-2[/tex]
m = -2.
Equation of the line:
y = -2x + b
Substitute any one point in the above equation and find the y-intercept. (-1,3)
3 = -2*(-1) + b
3 = 2 + b
3 - 2 = b
b = 1
Equation of the line:
y = -2x + 1
A movie store had four hundred ninety-five movies they were putting on six shelves. If the owner wanted to make sure each shelf
had the same number of movies how many more movies would he need?
He may keep 82 movies on each shelf, using up to 492 movies and leaving 3 movies to retain.
What is arithmetic operation?Arithmetic operations is a field of mathematics that studies numbers and the operations on numbers that are helpful in all other disciplines of mathematics. It consists mostly of operations like addition, subtraction, multiplication, and division. Arithmetic Operator is used to conduct mathematical operations on the supplied operands such as addition, subtraction, multiplication, division, modulus, and so on. Arithmetic operators carry out operations on numbers. Variables are assigned values using assignment operators. Logical operators compare two values and return either "true" or "false" depending on whether the comparison is true (or false).
Here,
Movies that movie store has=495 movies
Number of shelves=6
If the owner wanted to make sure each shelf had the same number of movies,
=495/6
=82.5
He can keep 82 movies in each shelf that will use up to 492 movies and 3 movies will be left to keep.
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find the missing length
21 is missing length of parallel lines.
What is an example of parallel lines?
In terms of geometry, parallel lines are two separate lines that never cross each other and are located in the same plane. They may be vertical or horizontal. In our daily lives, parallel lines can be seen in the form of zebra crossings, rows of notebooks, and the nearby railroad tracks.Because lines are parallel
so they cut into equal proportion
then , 4/10 = x/15
4 * 15/10 = x
x = 6
length of line = 15 + 6 = 21
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A balloon was originally filled to a volume of 4,400 cubic centimeters. Air inside the balloon leaks out over time.
Write an inequality that describes V, the volume of the balloon in cubic centimeters as air leaks out.
Enter your inequality without a thousands separator.
The inequality expression of the volume of the balloon is V < 4,400
How to determine the inequality expression?From the question, we have the following statement:
The initial volume of the balloon is 4,400 cubic centimeters
Also, we understand that:
The balloon leaks out over time
This means that the volume of air in the balloon decreases over time.
So, we have the following representation
V = Less than the initial volume
Rewrite as
V < 4400
Hence, the volume of the balloon at any time after it starts leaking is V < 4,400
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rocio is covering the curved surface of a cylindrical podium in wallpaper. the podium is 1.2 meters tall and has a diameter of 0.26 meters. about how much wallpaper does rocio need? a. b. c. d.
The area of wallpaper required is 0.98 [tex]m^{2}[/tex]
What is mensuration ?Mensuration is a division of mathematics that studies geometric figure calculation and its parameters such as area, length, volume, lateral surface area, surface area, etc. It outlines the principles of calculation and discusses all the essential equations and properties of various geometric shapes and figures.
Mensuration is a subject of geometry. Mensuration deals with the size, region, and density of different forms both 2D and 3D. Now, in the introduction to Mensuration, let’s think about 2D and 3D forms and the distinction between them.
Calculationd = 0.26m
h = 1.2m
s = pi * d * h
= 0.98 square meter
the area of wallpaper required is 0.98 [tex]m^{2}[/tex]
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Answer:
0.98 m²
Step-by-step explanation:
I got it right hope this helps.
36 and 30 percentage of 10
Answer: 120
explanation: We already have our first value 36 and the second value 30. Let's assume the unknown value is Y which answer we will find out.
As we have all the required values we need, Now we can put them in a simple mathematical formula as below:
STEP 136 = 30% × Y
STEP 236 =
30
100
× Y
Multiplying both sides by 100 and dividing both sides of the equation by 30 we will arrive at:
STEP 3Y = 36 ×
100
30
STEP 4Y = 36 × 100 ÷ 30
STEP 5Y = 120
Finally, we have found the value of Y which is 120 and that is our answer.
You can easily calculate 36 is 30 percent of what number by using any regular calculator, simply enter 36 × 100 ÷ 30 and you will get your answer which is 120
the rabbit population in a certain area is 200%of last years population. There are 700 rabbits this year how many were there last year
Answer:
the answer is 350
Step-by-step explanation:
if it increased by 200% that means it doubled
so when x is doubled we get 700
so: 2x=700
x=700/2
x=350
what does it mean for a sample to have a standard deviation of zero? describe the scores in such a sample. when standard deviation is zero, no two scores are exactly the same. when standard deviation is zero, you cannot measure variability. when standard deviation is zero, the scores have no variability. when standard deviation is zero, there are no data points in the sample.
A sample to have a standard deviation of zero means the score has no variability.
When the score has no variability it points towards the standard deviation being zero, This is the case where all the scores in the sample have the exact same value. This means there is no spread in the data set at all. The data set is combined in a single clumped value. Since there is only one value it would be the mean of the data set. The standard deviation measures the spread of a quantitative data set. This number cannot be a non-negative real number.
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Solve the following:
a) a/5+3=8
b) 3b/7-1=5
a) a/5 + 3 = 8
Step 1 : Minus both sides by 3
a/5 + 3 - 3 = 8 - 3 -> a/5 = 5
Step 2 : Multiply both sides by 5
a/5 x 5 = 5 x 5 -> a = 25.
b) (3b)/7 - 1 = 5
Step 1 : Add both sides by 1
(3b)/y - 1 +1 = 5 + 1 -> (3b)/7 = 6
Step 2 : Multiply both sides by 7
(3b)/7 x 7 = 6 x 7 -> 3b = 42
Step 3 : Divide both sides by 3
3b : 3 = 42 : 3 -> b = 14.
seven new employees, two of whom are married to each other, are to be assigned seven desks that are lined up in a row. if the assignment of employees to desks is made randomly, what is the probability that the married couple will have adjacent desks? (round your answer to the nearest tenth of a percent.) the probability that the couple has adjacent desks is %. what is the probability that the married couple will have nonadjacent desks? (round your answer to the nearest tenth of a percent.) the probability that the couple has nonadjacent desks is
The probability that the married couple will have adjacent desks is 0.2857and the probability that the married couple will have non-adjacent desks is 0.7143.
Probability is synonymous with potential. It is a branch of mathematics that studies the occurrence of a random event. The number ranges from 0 to 1. In mathematics, probability has been introduced to predict how likely events are to occur.
Given that
Of 7 new employees, 2 employees are married to each other; these 7 employees are to be assigned 7 desks that are lined up in a row.
If the assignment of the employees to the desks is made randomly, we have to find the probability that the married couple will have adjacent desks and will have non-adjacent desks.
Now, the event that the couple has non-adjacent desks is the complement of the event that they have adjacent desks.
Now, first, let us determine in how many ways can the couple have adjacent desks.
Let us consider the married couple as a single entity, that always stays together.
Then, in total, there are 6 entities; 5 non-related employees and 1 married couple.
Now, these 6 can be arranged among themselves in 6! number of ways.
The married couple can have adjacent desks in 2! ways.
So, the favorable number of cases, in which the couple has adjacent desks, is 6!*2!.
Again, 7 employees can be assigned desks in 7! number of possible ways.
That is, the number of all possible cases is 7!.
This means that
P(The couple has adjacent desks)
=6!*2!/7!
=0.2857.
Now,
P(The couple will have non-adjacent desks)
=1-P(The couple will have adjacent desks)
=1-0.2857
=0.7143
Therefore the probability that the married couple will have adjacent desks is 0.2857and the probability that the married couple will have non-adjacent desks is 0.7143.
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Oliver borrowed $1,500 to purchase a riding lawn mower for his lawn care business. The bank offered him an interest rate of 12% for 6 months. Calculate the simple interest using I = prt.
$69
$90
$420
$1,080
Pls hurry and thank you!
The simple interest using I = prt if Oliver borrowed $1,500 to purchase a riding lawn mowerat the rate of f 12% for 6 monthsis
How can the simple interestbe calculated?The concept that will be used is the concpt of simple interest and thei can be calculates using the simple interst formular which is
I = [(prt)/100]
where p = principal = $1,500
I = intereste rate
t=time
Then this can be expressed as
I= (prt)/100
I = ($1,500* 6/12 * 12 )/100
= $90
In conclusion the simple interest is now $90 which is the second option that is given.
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The graph of y=f(x) is drawn on the grid.
a) Write down the coordinates of the turning point of the graph. (1)
b) Write down the roots of f(x) = 0
c) Use the graph to find an estimate for f(2.5)
The solution to the points are:
Turning point: (1, -3.2)Root: (-1, 0) and (3, 0)Estimate of f(2.5) is -1.4The coordinates of the turning pointThis is the point where the curve or curves of the graph changes direction.
In this case, the turning point in the vertex
The graph has its vertex at (1, -3.2)
This means that
Turning point = (1, -3.2)
The roots of the functionThis is the point where the curve or curves of the graph touches the x-axis i.e. f(x) = 0
In this case, the points are: (-1, 0) and (3, 0)
This means that
The roots are (-1, 0) and (3, 0)
The estimate of f(2.5)This is the point where the curve or curves of the graph passes through x = 2.5
In this case, the points are: (2.5, -1.4)
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Find the asymptotes and intercept of the following rational function
Show your work for the intercepts!
Answer:
VA: x = 1, x = -1
HA: y = 0
x-int: (4, 0)
y-int: (0, 4)
Step-by-step explanation:
x-int:
0 = (x-4)/((x-1)(x+1))
0 = (x-4) because the (x-1)(x+1) are multiplied by 0
4 = x
x = 4
(4, 0)
y-int:
y = (0 - 4)/((0 - 1)(0 + 1))
y = (-4)/((-1)(1))
y = (-4)/(-1)
y = 4/1 = 4
(0, 4)
What is the angle amount of m
The angle amount of m is 128⁰
What is meant by an angle?Angle can also refer to the length of a rotation or an angle. The Greek word , which means "crooked, curled," and the English word "ankle," are related words. Both stem from the Proto-Indo-European root which means "to bend" or "bow," in some way.
A plane angle, according to Euclid, is the inclination to each other of two intersecting lines in a plane that are not perpendicular to one another. Proclus asserts that an angle must be either a quality, a number, or a connection. Eudemus used the first idea, viewing an angle as a departure from a straight line; Carpus of Antioch used the second idea, viewing an angle as the distance or space between intersecting lines; and Euclid used the third idea. Vertical angles, opposing angles, or vertically opposite angles refer to a pair of angles that are directly across from one another and are created by two straight lines meeting to form a "X". Vert is the shorthand for them. opp.
The vertical angle theorem states that angles that are vertically opposing are equal. The assertion shown that since both of a pair of vertical angles are supplementary to both of the neighboring angles, the vertical angles are equal in measure, according to Eudemus of Rhodes' attribution of the proof to Thales of Miletus. When Thales visited Egypt, it is recorded in history[9] that he noticed the Egyptians measuring the vertical angles whenever two intersecting lines were drawn to ensure that they were equal. Thales came to the conclusion that one might establish
4x+6=7x-21
3x=27
x=9
x+x+42+42=360
2x+84=360
x=128⁰
Therefore, the angle amount of m is 128⁰
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someone please help me im begging u for points
The solution of the algebraic equation is x = -2. The proof is elaborated below.
The algebraic equation given to us is 14(x + 1) = -7(4 + x). An equation is a mathematical statement that proves the equality of two mathematical expressions. The first step is to simplify the brackets. The equation becomes 14x + 14 = -28 - 7x. Now, we will add 7x to both sides of the equation. The equation is modified as 21x + 14 = -28. Now, we will subtract 14 from both sides of the equation. The equation is modified as 21x = -42. Now, we will divide both sides of the equation by 21. The equation is modified as x = -2.
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Given p=q=0
, what is the equation of the line that passes through the points (–p, –q) and (p, q)?
y = –x
y = q
y = 2x + (2p – q)
Equation of the line which passes through the given points (-p ,-q) and
(p, q) where p ≠ q ≠ 0 is given by y = (q/p)x.
As given in the question,
Given condition is :
p ≠ q ≠ 0
Equation of the line which passes through the given points (-p ,-q) and
(p, q) is given by:
(x₁ , y₁) = (-p ,-q)
(x₂ , y₂) = (p, q)
(y -y₁)/ (x -x₁) = (y₂ -y₁)/ (x₂ -x₁)
⇒(y +q)/(x+ p) = (q +q)/(p +p)
⇒(y +q)/ (x +p) = 2q /2p
⇒p(y+ q) =q( x +p)
⇒yp + pq = qx +pq
⇒yp = xq
⇒y = (q /p)x
Therefore, equation of the line which passes through the given points (-p ,-q) and (p, q) where p ≠ q ≠ 0 is given by y = (q/p)x.
The complete question is :
Given p ≠ q ≠ 0, what is the equation of the line that passes through the points (–p, –q) and (p, q)?
A. y = –x
B. y = q/px
C. y = q
D. y = 2x + (2p – q)
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Answer:
b
Step-by-step explanation:
just did it
8.
y=
Which word describes the connection between the shape and its reflection?
[] congruent
[] similar
[ ] translation
[] corresponding
The corresponding sides and angles of both the triangles [pre-image and the image] are congruent
what is congruency?Congruent in geometry refers to being the same size and shape. Congruence can be used with figures, angles, and line segments. If any two line segments are equal in length, they are said to be congruent. If two angles have the same measure, they are said to be congruent. If the matching sides and angles of two triangles are the same, they are said to be congruent. In this post, we will learn more about congruence and congruent figures.The word 'congruent' means 'exactly equal' in terms of shape and size. Even when we turn, flip, or rotate the shapes, they remain equal.Hence,The corresponding sides and angles of both the triangles [pre-image and the image] are congruent
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