Answer:
length is 20 yards, width is 15 yards
Step-by-step explanation:
Length = width + 5
2(W + 5) + 2(W) = 70
2W + 10 + 2W = 70
4W + 10 = 70
4W = 60
W = 60 ÷ 4
W = 15 yards
L = 15 + 5
L = 20 yards
a house is 13 ft tall. its shadow is 20 ft long at the same time the shadow of a nearby building is 170 ft long. find the height of the building.
The height of the building after using proportion is 110.5 ft.
What is proportion ?
The main conceptual underpinnings on which proportion is described are ratio and fractions. When two ratios are written as a fraction using the formula a/b, ratio a:b, and then a proportion, they are equal. A and b in this situation can be any two integers. For grasping the myriad concepts in science and mathematics, the ratio and proportion are crucial constructing elements. With the right amount of proportion, a variety of problems in daily life, such as those encountered in the kitchen or in business when processing transactions, can be resolved. It facilitates comparison by establishing a relationship between two or more quantities.
Here House height = 13ft
Shadow of the house height = 20 ft
Shadow of the building height = 170ft
Noe using proportion ,
=> [tex]\frac{House height}{shadow of the house} = \frac{building height}{shadow of the building}[/tex]
=> [tex]\frac{13}{20} = \frac{x}{170}[/tex]
=> x=[tex]\frac{13*170}{20}[/tex] =110.5 ft.
Hence the height of the building is 110.5 ft tall.
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Assuming that no questions are left unanswered, in how many ways can a nine question
true false quiz be answered?
The number of ways that a nine question true false quiz can be answered is; 512 ways
What is the number of ways of answering?
We are given;
Number of questions = 9
Options for each answer = 2 (True of false)
The power set is defined as the number of subsets of a set of n elements which is expressed as 2ⁿ
There are 2 ways to answer question 1 and as such it means that there are 2 ways to answer question 2.
For question 2; 2² = 4 ways
For question 3; 2³ = 8 ways
For question 4; 2⁴ = 16 ways
For question 5; 2⁵ = 32 ways
For question 6; 2⁶ = 64 ways
For question 7; 2⁷ = 128 ways
For question 8; 2⁸ = 256 ways
For question 9; 2⁹ = 512 ways
Thus we we conclude that, there are 512 ways to answer 9 true-false tests.
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Find the exact value of cosine (alpha beta) given sin alpha = two-fifths for alpha in quadrant ii and cosine beta = one-third for beta in quadrant iv. startfraction 8 startroot 2 endroot startroot 15 endroot over 15 endfraction startfraction 4 startroot 2 endroot startroot 21 endroot over 15 endfraction startfraction 4 startroot 2 endroot minus startroot 21 endroot over 15 endfraction
The exact value for cos (α+β) is √21/25- 4√2/15, for the given quadrants II and IV
we know that cos (α+β)) = cos α cos β - sin α sin β, we are given the values of sin α=2/5 and cos β= 1/3 ( both are positive for quadrant 2 and 3). Since we know cos² a + sin² a = 1
for α, cos² α + sin² α = 1
=> cos² α = 1 - sin² α
=> cos² α = 1 - 4/25
=> cos α = √21/25
same for β, cos² β + sin² β = 1
=> sin² β = 1 -cos² β
=> sin² β = 1 -1/9
= 8/9
=2√2/3
substituting the known values in the above formula for cos (α+β)
=>cos α cos β - sin α sin β
=√21/25 *1/3- 2/5*2√2/3
=√21/25- 4√2/15
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Answer:
d. [tex]\frac{4\sqrt{2}-\sqrt{21} }{15}[/tex]
Step-by-step explanation:
The lovely person in the comments was correct on Edge so i decided to put it as an answer in case anyone was looking for it!
Have a lovely day!
the average monthly rent for one-bedroom apartments in a particular city has been $770. because of a downturn in the real estate market, it is believed that there has been a decrease in the average rental. which is the correct hypotheses to be tested?
The set of values for Rents lesser than $700. So, rent 700 <y<0
Hypothesis.Though there is not so much information, but the fact that $700 is an average. We can work with two hypothesis at first, he first Hypothesis before the downturn the rent are over $700. And the second one, the bedroom rent are under $700.1) Graphically, the shaded area before the downturn, represents the set of values for Rents greater than $700. So, rent (y) > 7002) Graphically, the shaded area after the downturn, represents the set of values for Rents lesser than $700. So, rent 700 <y<0A hypothesis is an educated prediction regarding the solution to a scientific question that is supported by sound reasoning. It is the expected result of the experiment, however it is not proof in an experiment. Depending on the information received, it might be supported or might not be supported at all.learn more about hypothesis click here:
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A pe class has 484848 students. one group of 242424 students chooses to play volleyball. the teacher then divides the remaining students into as many groups of 555 as possible to shoot baskets. after that, the remaining students (not on a volleyball or basketball team) climb the rock wall. how many students climb the rock wall?
444 students will climb the rock wall.
Given, that A class has 484848 students, one group of 242424 students chooses to play volleyball.
Then the teacher divides the remaining students into as many groups of 555 as possible to shoot baskets.
After that, the remaining students (not on a volleyball or basketball team) climb the rock wall.
Now, we are asked that the students who climb the rock wall
So, from a class of 484848 students if One group of 242424 students is made to play volleyball then there will be 242424 students remaining.
Now, to divide 242424 students into groups of 555 students,
we need to divide 242424 by 555, then we get
242424/555 = 436.8
Now there will be 436 groups of 555 students who will shoot basket and remaining 444 students who will climb the rock wall.
Hence, 444 students will climb the rock wall.
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Please answer this
This is very hard for me and my friend
The value of x is 10.6 which is equivalent to 11.
In the given triangle
the triangle is divided into two triangles which are both right angled
However in the bigger triangle
we would use the Pythagoras Theorem
( y + 6 )² = x² + 100 ---------- equation 1
In the smaller triangle;
x² = y² + 64 --------------equation 2
Thus substituting the value of x in equation 1
Thus the equation becomes
( y + 6 )² = y² + 64 + 100
y² + 36 + 12x = y² + 164
Cancelling y² on both sides we will get
36 + 12x = 164
12x = 164 - 36
this implies 12 x = 128
x = [tex]\frac{128}{12}[/tex]
x = 10.6 ≈ 11
Thus the required value of x is 10.6 or 11
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what is the distance between point P (-5,7) and point Q (6,7) ?
Answer:
11
Step-by-step explanation:
Distance formula is square root of (x2-x1)^2+(y2-y1)^2
square root of (6-(-5))^2+(7-7)^2
square root of (11)^2+(0)^2
square root of 121+0
square root of 121
11
distance is 11
Two integers, a and b, have a product of 20. What is the least possible sum? pls help lol
The least possible sum wen the integers, a and b, have a product of 20 is 9.
How to calculate the sum?From the information given, two integers, a and b, have a product of 20. It should be noted that the values that an give a product of 20 will be:
1 × 20 = 20
2 × 10 = 20
4 × 5 = 20
Therefore, the sum of the factors will be:
1 + 20 = 21
2 + 10 = 12
4 + 5 = 9
The least possible sum is 9.
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1.A recipe for salad dressing calls for three parts oil for every one part vinegar. How many tablespoons of oil are vinegar are needed to make 1/2 cup salad dressing?
Answer:
4 to 7 percent.
Step-by-step explanation:
We use the traditional oil-to-vinegar ratio: three parts oil to one part vinegar/acid, but this ratio can vary depending on your choice of vinegar/acid and personal taste. The less acidic the vinegar/acid, the less oil you need. It's all about balance!
Explain why AB and AC are equal in length
Answer:
see explanation
Step-by-step explanation:
the sum of the 3 angles in the triangle = 180°
∠ B + 72° + 36° = 180°
∠ B + 108° = 180° ( subtract 108° from both sides )
∠ B = 72°
Then
∠ B = ∠ C = 72°
this means the 2 base angles in Δ ABC are congruent , then the triangle is isosceles with the 2 legs being congruent , that is
AB = AC
a man 6 ft tall walks at the rate of 5 ftsec toward a streetlight that is 16 ft above the ground. at what rate is the length of his shadow changing when he is 10 ft from the base of the light?
The rate at which length of shadow of person changing is 3 ft /sec.
What is meant by time rate?The literal formula for the relationship between distance, rate, and time is distance=rate×time=rtH = Height of streetlight; 16 ft
h = Height of man; 6 ft
x = Length of man's shadow.
s = Distance from streetlight to man.
Using the similarities of the triangles.
H/h = (s + x)/x
Hx = h(s + x)
Differentiate with respect to 't' on both sides.
H(dx/dt) = h(ds/dt + dx/dt)
Put the values.
16(dx/dt) = 6(5 + dx/dt)
16(dx/dt) = 30 + 5dx/dt
10dx/dt = 30
dx/dt = 3 ft /sec
Thus, the rate at which length of shadow of person changing is 3 ft /sec.
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Let's find 1/10 + 1/2
First write the addition so the fractions have denominator 10. Then add
Answer:
3/5
Step-by-step explanation:
Given problem,
→ (1/10) + (1/2)
Let's solve the problem,
→ (1/10) + (1/2)
→ (1/10) + (5/10)
→ 6/10
→ 3/5 {simplest form}
Thus, answer is 3/5.
Part A: Timothy said that triangle KLM was dilated by a scale factor of 1.5 centered at the origin. Is Timothy correct? Explain your answer or show your work by listing the coordinates of the primage and image and showing the scale factor
Part B: Are the two triangles similar? Explain.
a. Timothy is correct regarding the dilation, considering the vertices of each triangle.
b. The two triangles are similar, as they have congruent angle measures.
What is a dilation?A dilation occurs when each of the vertices of a polygon is multiplied by a constant, which is called scale factor.
The effects of a dilation are given as follows:
Congruence is lost, as the side lengths will be different due to the multiplication by the scale factor.Similarity is kept, as the side lengths are proportional, hence the angles remain constant.The vertices of each triangle in this problem are given as follows:
Triangle KLM: K(-1,3), L(8,4) and M(10,-3).Triangle K'L'M': K'(-1.5, 4.5), L'(12, 6) and M'(15, -4.5).The scale factor is obtained by the division of any of the equivalent factors, hence:
k = 4.5/3 = 1.5.
Confirming that Timothy's statement regarding the scale factor of the dilation is correct.
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help meeeeeeeeeeeeeeeeeee pleaseeee rn rnnnnnnnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
help meeeeeeeeeeeeeeeeeee pleaseeee rn rnnnnnnnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The length of the rectangular area is 800 yards and width is 800 yards
The perimeter of the rectangular area = 3200 yards
The perimeter of the rectangle = 2 (l + w)
Then the equation will be
2(l + w) = 3200
l + w = 3200 / 2
l + w = 1600 yards
w = 1600 - l
The area of the rectangular area = l × w
= l(1600 - l)
Since the area is maximizing the the rate of change of area will be zero
l × w = 0
1600 - 2l = 0
2l = 1600
l = 1600/2
l = 800 yards
Then
w = 1600 - l
Substitute the value of l in the equation
w = 1600 - 800
w = 800 yards
Hence, the length of the rectangular area is 800 yards and width is 800 yards
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I need help it’s due by 11:59pm
I need
Range=
Domain=
Answer:
Range: [tex]\text{y} \ge 0[/tex]
Domain: [tex]\text{x} \ge 0[/tex]
Both involve "greater than or equal to 0".
==============================================
Explanation:
The domain is the set of allowed inputs (x). The smallest input allowed in this case is x = 0, as it corresponds to the left-most point (0,0) on the blue graph. There is no largest x value since it stretches forever to the right.
Either x = 0 or x > 0 which condenses to [tex]\text{x} \ge 0[/tex] and this is the domain as an inequality.
--------
The range will have us look at the possible y values or possible outputs. We have y = 0 as the smallest output possible, which corresponds to the lowest point (0,0).
There is no largest y value since the blue graph goes forever upward.
Either y = 0 or y > 0 to give us the range of [tex]\text{y} \ge 0[/tex]
Please help. ill give brainliest
Answer:
I believe the answer is number 2, which is 20 degrees.
Step-by-step explanation:
When I plugged that number in for x for both of them I got the numbers 81 and 99. Added them together ad they made 180 degrees. Which makes them supplementary.
WXYZ is a kite. ∠WXY has a measure of 94° and ∠ZWX has a measure of 112°. Find the measure of ∠ZYW.
well, we know WXYZ is a kite, so is a quadrilateral, namely it has 4 sides, and it has two congruent angles, so
[tex]\underset{in~degrees}{\textit{sum of all interior angles}}\\\\ S = 180(n-2) ~~ \begin{cases} n=\stackrel{number~of}{sides}\\[-0.5em] \hrulefill\\ n=4 \end{cases}\implies S=180(4-2)\implies S=360 \\\\[-0.35em] ~\dotfill\\\\ 94+94+112+\measuredangle ZYW=360\implies \implies \measuredangle ZYW=60[/tex]
Check the picture below.
Convert 90°F into °C
Answer:
32.2222
Step-by-step explanation:
Answer: 32.22 degrees Celsius.
kendra ran 12 miles in 60 minutes. if the ratio of miles to minutes is constant how many more miles can she run in 90 minutes than in 60 minutes
Answer:
it is 18 mile
Step-by-step explanation:
12mile = 60 min
x = 90 min
we cris cross the equation and
we found x=18 mile
I need help with this
Answer:
Yes.
Step-by-step explanation:
To decide if these triangles are similar, we need to check 2 criteria. The first is that the angles are all the same as their corresponding angles on the other triangle, which is true. The second is to check if the sides are all in the same proportional relationship. To do this, we need to put 40/50, 40/50, and 16/20 to see if they simplify to the same fraction (which is the proportion.) 40/50 and 40/50 simplify to the same fraction, 4/5. 16/20 also simplifies to 4/5, so the sides are all in the same proportion, which means the shapes are similar.
Two trains are 525 miles apart heading toward each other on parallel tracks. Train A is traveling east at 30 miles per hour, while Train B travels west at 45 miles per hour. When will the trains pass each other?
The two trains will pass each other after 7 hours.
Both trains need to cover a distance of 525 miles before they cross each other.
We know, d = s × t
where d ⇒ total distance travelled
s ⇒ speed of the train
t ⇒ time taken for both trains to meet
For train A,
s = 30 miles per hour
Distance covered by train A in t hours = 30 × t
For train B,
s = 45 miles per hour
Distance covered by train B in t hours = 45 × t
As the total distance is 525 miles,
30t + 45t = 525
75t = 525
t = 7 hours
Hence, the trains will pass each other after 7 hours.
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The cost of mailing a package is proportional to the weight of the package. The proportional relationship can be represented with the equation c = 0.8w, where c represents the total cost and w represents weight in ounces. A graph for the equation is shown. graph with x axis labeled weight in ounces and y axis labeled cost in dollars, with a line from 0 comma 0 going through 2 comma 1.6 Which of the following statements is true about the graph shown?
The correct statement regarding the proportional relationship c = 0.8w is given as follows:
The equation c = 0.8w is correctly represented by the graph.
What is a proportional relationship?A proportional relationship is a special case of a linear function, with slope represented by the constant of proportionality of k and intercept of 0.
When the two variables x and y are direct proportional, the output variable y is obtained as the multiplication of the input variable x by the constant of proportionality k, as follows:
y = kx.
In this problem, the equation is given as follows:
c = 0.8w.
In which:
c is the cost in dollars -> output -> y-axis of the graph.w is the weight in ounces -> input -> x-axis of the graph.For a input of 2, the output is given as follows:
c = 0.8 x 2 = 1.6.
Hence point (1,0.8) is in the graph, along with point (2,1.6).
Missing InformationThe statements are given as follows:
The equation c = 0.8w is correctly represented by the graph.The graph is incorrect and the line should go through the point (0.8, 1).The x-axis and y-axis are labeled incorrectly.The graph does not show a proportional relationship.More can be learned about proportional relationships at https://brainly.com/question/10424180
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Find the slope of the following graph
Answer:
3/2x
Step-by-step explanation:
What is the image of (-1,7) after a reflection over the line y = x
The image of (-1,7) after a reflection over the line y = x is (7, -1).
What is a line of reflection?
When reflecting a figure in a line or a point, the image and preimage coincide. A reflection converts each point in a figure from a point to an image via a set line. The reflection line is the name given to the fixed line.
Here, we have
Image : (-1.7)
Now,
Reflect over the line y = x:
When reflecting a point across the line y = x, the x-coordinate, and y-coordinate change places.
Thus, the point (-1,7) maps to the point (7,-1) when reflected over y=x.
Hence, The image of (-1,7) after a reflection over the line y = x is (7, -1).
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what is the restricted domain on the tangent function that allows us to build the arctangent (inverse tangent) function?
(-π/2 , π/2) is the restricted domain on the tangent function that allows us to build the arctangent (inverse tangent) function.
As, we know that the Tangent function is neither an One-One nor Onto function. So, the domain should be restricted to obtain the inverse function of the Tangent function.
Domain of the tangent function be, R - {(2n+1)π/2}
Range of the tangent function be, R
Now, to build the inverse tangent function we have to restrict the domain so that, the function will be one-one and onto both.
So, the restricted domain be (-π/2 , π/2).
In the domain (-π/2 , π/2), the tangent function is one-one and onto both and hence, we can build the inverse tangent function i.e. arctangent.
So, (-π/2 , π/2) is the restricted domain on the tangent function that allows us to build the arctangent (inverse tangent) function.
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Which of the following statements is true?
25 : 35 = 45 :55 =
105 : 30 = 49 : 64 =
45 : 48 = 60 : 64 =
2/3 : 7/9 = 3/4 : 5/6 =
4.2 : 12.6 = 1.5 : 4.5 =
12 : 18 = 28 : 12 =
Answer:
3
Step-by-step explanation:
45*64=2880
48*60=2880
I need help that’s it
Answer:
x-intercept(s): (−5,0)
y-intercept(s): (0,−5)
Explanation:
To find the x-intercept, substitute in 0 for y and solve for x. To find the y-intercept, substitute in 0 for x and solve for y.
Im also in K12 so Ez Good Luck
Hope this helped!
what is the difference between -3 and 10
Answer:
13
Step-by-step explanation:
-3-10, or 10+3 is equal to 13
Answer:
13
Step-by-step explanation:
-3+13=10
A regular polygon has 16 sides. If one of its angles measures (5h − 29)°, what is the value of h?
Answer:10.3
Step-by-step explanation:
16(5h-29)=360
80h-464=360
80h-464+464=360+464
80h/80=824/80
h=10.3
Direct or Inverse variation
3y=x
{(2,6),(3,9),(5,15)}
{(1,16),(2,8),(4,4)}
The answers are as follows -
Relation 3y=x represents direct variation.Relation {(2,6),(3,9),(5,15)} represents direct variation.Relation - {(1,16),(2,8),(4,4)} reflects inverse relation.What is the general equation of a Straight line?
The general equation of a straight line is -
[y] = [m]x + [c]
where -
[m] is slope of line which tells the unit rate of change of [y] with respect to [x].
[c] is the y - intercept i.e. the point where the graph cuts the [y] axis.
y = mx also represents direct proportionality. We can write [m] as -
m = y/x
OR
y₁/x₁ = y₂/x₂
Given are the following relations -
3y = x
{(2,6),(3,9),(5,15)}
{(1,16),(2,8),(4,4)}
We can write -
x = 3y
as
y = (1/3)x
m = 1/3
Relation 3y=x represents direct variation.
For the relation - {(2,6),(3,9),(5,15)}, we can write -
We can write it as -
y = 3x
Relation {(2,6),(3,9),(5,15)} represents direct variation.
For the relation - {(1,16),(2,8),(4,4)} , as [x] increases, [y] decreases, so it is a inverse relation.
Therefore -
Relation 3y=x represents direct variation.Relation {(2,6),(3,9),(5,15)} represents direct variation.Relation - {(1,16),(2,8),(4,4)} reflects inverse relation.To solve more questions on proportional relationship, visit the link below-
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