2. Which of the following cannot be a part of a rational expression?O-7x⁰3x²3x² - 4x + 5043x² - 4√x
Answers
To be part of a rational expression, we need to have a polynomial expression.
By definition, all the exponents of a polynomial expression are positive integer values (including 0).
We know that:
[tex]\sqrt{x}=x^{\frac{1}{2}}[/tex]So the last option is not a polynomial.
Answer: The last option
Related Questions
Consider the line -9x-4y=-2.What is the slope of a line parallel to this line?What is the slope of a line perpendicular to this line?Would the perpendicular slope be -4/9 and the parallel line be 9/4?
Answers
first we solve the equation for y
[tex]\begin{gathered} -4y=-2+9x \\ \\ y=\frac{-2+9x}{-4} \\ \\ y=\frac{1}{2}-\frac{9}{4}x \end{gathered}[/tex]on this line the slope is the coefficient of x, so the number that accompanies the variable x
the slope is
[tex]-\frac{9}{4}[/tex]for a line to be perpendicular to it, it must have the inverted fraction and the opposite sign to the original slope
then
[tex]-\frac{9}{4}\longrightarrow\frac{4}{9}[/tex]the slope of the perpedicular line is 4/9
and the slope of a parallel line must be the same slope, so
[tex]-\frac{9}{4}[/tex]Two thirds of a number is 4
Answers
Answer:
(2/3)x +4 = 1
(2/3)x = -3
x = -3 *3/2 = -9/2
Step-by-step explanation:
your welcome <3
One angle of an isosceles triangle measures 42°. what measures are possible for the other two angles? choose all that apply.
Answers
The measure of second angle and third angle of the isosceles triangle will be equal to 69° each.
What is an isosceles triangle ?
An isosceles triangle is a triangle which has two equal sides and two equal angles.
It is given that the first angle of an isosceles triangle is 42°. In a triangle sum of all angles is equal to 180°.
We know that in an isosceles triangle the measure of two angles and two sides are equal.
The measure of first angle is 42°. Let's assume the measure of second angle is x this meant the measure of third angle will be x too.
∵ Sum of three angles of a triangle = 180°
∴ 42 ° + ( x + x ) = 180°
or
42 ° + ( 2x ) = 180°
2x = 180° - 42°
2x = 138°
or
x = 69°
As measure of both unknown angles is same , so second angle and third angle will have a measure of 69° each.
Therefore , the measure of second angle and third angle of the isosceles triangle will be equal to 69° each.
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5.Find the equation ofthe line:through: (0, -3) and (-1,-5)
Answers
first, we will find the slope
[tex]m=\frac{-5-(-3)}{-1-0}=\frac{-5+3}{-1}=\frac{-2}{-1}=2[/tex]so, the slope is m = 2
now the equation of the line is
[tex]\begin{gathered} y-(-3)=m(x-0) \\ y+3=2x \\ y=2x-3 \end{gathered}[/tex]so, the equation of the line is y = 2x -3
is econometrics science or commerce related
Answers
Answer:
Yes,econometrics science and commerce are related
Which equation represents the line whose slope is 6 and whose y- intercept is 2?
Steps please
Answers
y=−2x+6
Explanation:
the equation of a line in
slope-intercept form
is.
∙xy=mx+b
where m is the slope and b the y-intercept
here m=−2and b=6
⇒y=−2x+6←
is the equation
a. What is the center of dilation?
b. What is the shape that was dilated?
c. Is the scale factor one-third, two, or three?
Answers
Answer:
well I can answer b the shape here is a 3D Hexagonal pyramid
2 (02.05)John bought 15 cookies and ate 3 of them. He ate% of the cookies. (Makpoints)3. (02.05)had $125 to spend at the ma. She spent
Answers
You have the following information:
- John bought 15 cookies
- John ate 3 of the 15 cookies
In order to calculate the percentage associated to the 3 cookies John ate, respect to the total cookies, you proceed as follow:
[tex]\frac{3}{15}(100)=\frac{300}{15}=20[/tex]Hence, John ate 30% of the total number of cookies.
Convert 7/8, 1/2 and 7/9 to equivalent fractions with denominator 72 their LCD
Answers
Answer:
63/72
36/72
56/72
Step-by-step explanation:
7/8
The denominator has to be 72. So, we find a factor of 72 with 8. it is 9.
7*9= 63
8*9= 72
63/72
For 1/2:
1*36=36
2*36=72
36/72
For 7/9:
7*8=56
9*8=72
56/72
This graph represents a linear or exponential function?A linearB exponential
Answers
As the graph is a straight line hence the it is a linear function.
Candice and Porter each want to run for president of their school's student body council. In order to do so, they must collect a certain number of signatures and get a nomination. So far, Candice has 21 signatures, and Porter has 18. Candice is collecting signatures at an average rate of 2 per day, whereas Porter is averaging 5 signatures every day. Assuming that their rate of collection stays the same, eventually the two will have collected the same number of signatures. How long will that take? How many signatures will they both have?
In ______ days, Candice and Porter will each have collected ________ signatures.
Answers
In 1 day, Candice and Porter will have collected 23 signatures each, using a system of equations.
What are equations?Equations are mathematical statements that claim that two expressions are equal or equivalent.
Equality is depicted using the equation sign (=).
Candice Porter
The number of signatures collected for nomination 21 18
Average collection of signatures per day 2 5
Let the total signatures collected by Candice on day x = 21 + 2x
Let the total signatures collected by Porter on day x = 18 + 5x
The day the two candidates will have collected the same signatures is set as equality:
21 + 2x = 18 + 5x
21 - 18 = 5x - 2x
3 = 3x
x = 1
Check:
Total signatures collected by on day 1:
Candice = 21 + 2x = 21 + 2(1) = 23
Porter = 18 + 5x = 18 + 5(1) = 23
Thus, for Candice and Porter to have collected the same number of signatures, it will take them 1 day and each will have 23 signatures, using a system of equations.
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a pirate keeps 2/3 of his coins in a treasure chest and distributes the rest equally among three crew members. if each crew member receives 25 coins, how many coins did the pirate keep
Answers
ANSWER:
150 coins
STEP-BY-STEP EXPLANATION:
We know that of the total that the pirate initially had 2/3 I keep them in a chest and the rest he distributed, the rest corresponds to 1/3 of the total.
Now, if each one received 25 coins, and 3 three members, it means that 1/3 is equivalent to 3 times 25 coins, that is, 75 coins.
Now, if 1/3 is 75 coins, 2/3 proportionally would be:
[tex]\begin{gathered} \frac{75}{\frac{1}{3}}=\frac{x}{\frac{2}{3}} \\ \text{ solving for x} \\ 225=\frac{3x}{2} \\ x=\frac{225}{3}\cdot2 \\ x=150 \end{gathered}[/tex]Which means that the pirate kept 150 coins in the chest
Use the Distributive Property to factor: 3x2 + 3x + 9
Answers
Solution:
Consider the following expression:
[tex]3x^2+3x+9[/tex]Applying the distributive property, we get:
[tex]3(x^2+x+3)[/tex]Note that the term on the right is irreducible. Then, the correct answer is:
[tex]3(x^2+x+3)[/tex]Please help I need this for a text ASAP.
Answers
The values of x and y are 45 and 8.
What is a Linear Pair of Angles?When two lines meet at a single point, a pair of linear angles is created. If the angles follow the point where the two lines cross, they are considered to be linear. A linear pair's angles add up to 180° in every case.
Given:
Measures of two linear pairs of angles which are of equal measures are 2x and 11y + 2.
As the sum of linear pair of angles is 180°, and if they are of equal measures, each angle must be equal to 90°.
To determine the values of x and y we equate the given angles to 90°.
2x = 90°
⇒ x = 45
And 11y+2 = 90°
⇒ 11y = 90-2 = 88
⇒ y = 8
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Find the values of x and y. please help <3
Answers
Answer:
x = 16
y = 17
Step-by-step explanation:
7x + 52 + x = 180 = (x = 16)
7(16) + 4y = 180 = ( y = 17)
the quotiant of a number and 3 is 8
Answers
the quotiant of a number and 3 is 8:
[tex]\begin{gathered} \frac{x}{3}=8 \\ \text{Solve for x:} \\ \text{Multiply both sides by 3:} \\ x=8\times3 \\ x=24 \end{gathered}[/tex]nine times a number is -63:
[tex]undefined[/tex]A genetic experiment with peas resulted in one sample of all springs that consisted of 414 green peas
Answers
Given
Confidence level = 90% = 0.90
green peas = 414
yellow peas = 155
Find
Estimate of the percentage of yellow peas.
Explanation
Confidence level = 90% = 0.90
number of successes = 155
sample size = 414 + 155 = 569
so ,
[tex]\hat{p}=\frac{x}{n}=\frac{155}{569}\approx0.2724[/tex]for confidence level ,
[tex]1-\alpha=1-0.90=0.10[/tex]so ,
[tex]z_{\frac{\alpha}{2}}=1.645[/tex]margin of error =
[tex]\begin{gathered} E=z_{\frac{\alpha}{2}}(\sqrt{\frac{\hat{p}(1-\hat{p})}{n}}) \\ \\ E=1.645\times\sqrt{\frac{0.2724(1-0.2724)}{569}} \\ \\ E=1.645\times\sqrt{0.00034832731} \\ \\ E=0.03070150499\approx0.0307 \end{gathered}[/tex]boundaries of the confidence level are
[tex]\begin{gathered} \hat{p}-E=0.2724-0.0307=0.2417=24.17\% \\ \hat{p}-E=0.2724+0.0307=0.3031=30.31\% \end{gathered}[/tex]Final Answer
Hence , the estimate of the percentage of yellow peas is between 0.242 and 0.303
Fatima us on the track team. One day at practice, it took her 19 minutes to run2 miles ,select the expression that gives this as a unit rate
Answers
The unit rate expression is 19/2 or 7.5 units.
What is unitary Method?A single unit's value may be determined from the values of multiple units, and multiple units' values can be determined from the values of single units using the unitary technique. We typically utilise this technique for math computations. This approach will be helpful to you while tackling problems involving ratio and proportion, algebra, geometry, etc.
This approach allows us to calculate both the value of many units from the value of one unit and the value of one unit from the value of many unit.
Given:
Total time taken= 19 minutes
Total distance = 2 miles
Now, find the unit rate we have to divide the
unit rate = 19/2
= 7.5
Hence, the unit rate is 7.5 units.
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Which pair of numbers has a GCF of 5? A.15 and 30 C.45 and 9 B.5 and 21 D.20 and 55
Answers
Answer:
D
Step-by-step explanation:
The GCF in answer choice A is 15.
The GCF in answer choice B is none.
The GCF in answer choice C is 9 since 45 is divisible by 9 and 9 is divisible by itself
D is correct as 55/5 = 11 and cannot be divided anymore. And 20 is divisible by 5
If a1=8 and an= 5an-1 + 5 then find the value of a5
Answers
a_5 =5780
1) Given the 1st term a_1 =8 and the Recursive formula for this Sequence, let's find the 5th term by plugging and finding each term. Like this:
[tex]\begin{gathered} a_n=5a_{n-1}+5 \\ a_2=5(8)\text{ +5}\Rightarrow a_2=45 \\ a_3=5(45)+5\Rightarrow a_3=230 \\ a_4=5(230)+5\Rightarrow a_4=1155 \\ a_5=5(1155)+5\Rightarrow a_5=5780 \\ (8,\text{ 45, 230, 1155, 5780)} \end{gathered}[/tex]2) Since it is a Recursive Formula we need to recur to the previous term to find the subsequent one. So
[tex]a_5=5780[/tex]A rancher has a pen shown on the grid, where 1 unit represents 1
meter. The rancher needs a larger pen to be a dilation of the
smaller pen by a scale factor of 3.5 with the origin as the center of
dilation.
Answers
The coordinates of the vertices of the rectangle are A'(x, y) = (3.5, 3.5), B'(x, y) = (3.5, 7), C'(x, y) = (10.5, 7) and D'(x, y) = (3.5, 10.5). The graph of the new pen is shown below.
What is the representation of a pen by using a scale factor?
We find a representation of a original pen, whose vertices are shown on Cartesian plane. The new pen is the result of dilating the original one by a scale factor of 3.5 and with center at the origin. The expression that describes the transformation is:
P'(x, y) = k · P(x, y)
Where:
P(x, y) - Original pointP'(x, y) - Resulting pointk - Scale factorIf we know that A(x, y) = (1, 1), B(x, y) = (1, 2), C(x, y) = (3, 2), D(x, y) = (1, 1) and k = 3.5, then the coordinates of the resulting point are:
A'(x, y) = 3.5 · (1, 1)
A'(x, y) = (3.5, 3.5)
B'(x, y) = 3.5 · (1, 2)
B'(x, y) = (3.5, 7)
C'(x, y) = 3.5 · (3, 2)
C'(x, y) = (10.5, 7)
D'(x, y) = 3.5 · (1, 3)
D'(x, y) = (3.5, 10.5)
The graph of the resulting rectangle is shown below.
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Determine which solution is correct for solving - y = 6 using reciprocals. 5 7 Y=6 5 7 y 5 30 7 5 - (윽) (6) y = ○ 5 7y=6 5 y-23 y= 5 -6- 7 5 5 74= 6 7 5 y = 5 42 5 y = (3) (6) 5 74=6 (7) 5 5 y=6 y=6
Answers
The correct answer for the reciprocal y = 42/5
What is Reciprocal?
The multiplicative reciprocal or reciprocal of a number x, denoted 1/x or x⁻¹, is the number that, when multiplied by x, gives a multiplicative identity element of 1. The multiplicative inverse of the fraction a/b is b/a. For the multiplicative reciprocal of a real number, divide 1 by the number.
Given,
5/7 y = 6
The reciprocal of 5/7 will be 7/5
Then,
Multiplying both side by 7/5, we get
(7/5)(5/7)y = (7/5)6
y = 42/5
Hence, y = 42/5 is the right answer
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Jill is making a candle by pouring melted wax into a mold in the shape of a square pyramid. Each side of the base of the pyramid is 9 cm and the height of the pyramid is 10 cm. To get the wax for the candle, she melts cubes of wax that are each 4 cm by 4 cm by 4 cm. How many of the wax cubes will she need in order to make the candle? Show your work.
Answers
Step 1:
First, write the formula and find the volume of the pyramid of height 10cm and base sides 9cm.
[tex]\text{Volume of a pyramid = }\frac{1}{3}\text{ base area }\times\text{ height}[/tex]Step 2:
Find the base area
[tex]\begin{gathered} \text{The base is a square of length L = 9}cm \\ \text{Base area = Area of a square = L}^2 \\ \text{Base area = 9}^2 \\ \text{Base area = 81 }cm^2 \end{gathered}[/tex]Step 3:
Find the volume of the pyramid.
[tex]\begin{gathered} \text{Volume of the pyramid = }\frac{1}{3}\times\text{ base area }\times\text{ height} \\ \text{Volume of the pyramid = }\frac{1}{3}\text{ }\times\text{ 81 }\times\text{ 10} \\ \text{Volume of the pyramid = }\frac{810}{3}\text{ = 270 }cm^3 \end{gathered}[/tex]Step 4:
Find the volume of a cube of a candle wax of sides 4cm by 4cm by 4cm.
[tex]\begin{gathered} \text{Volume of a cube of side L = 4}cm\text{ is } \\ \text{Volume of a cube = 4 }\times\text{ 4 }\times\text{ 4} \\ \text{Volume of a cube = 64 }cm^3 \end{gathered}[/tex]Step 5
To find the number of wax cubes she will need in order to make the candle
You will divide the volume of the pyramid by the volume of the cube.
The number of wax cubes she will need in order to make the candle
[tex]\begin{gathered} =\text{ }\frac{270}{64} \\ =\text{ 4.21875} \\ =\text{ 5} \end{gathered}[/tex]Final answer
5 wax cubes
Find the slope of the line that is perpendicular to the line that passes through the following pair of points: (12, -16) and (-2, -11)
Answers
,First we need to find the slope of the line that passes through (12, -16) and (-2, -11)
the slope can be calculated using these points
(12, -16)=(x1,y1)
(-2, -11)=(x2,y2)
the formula to calculate the slope is
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]we substitute the values
[tex]m=\frac{-11+16}{-2+12}=\frac{5}{10}=\frac{1}{2}[/tex]The slopes of two perpendicular lines are negative reciprocals of each other. This means that if a line is perpendicular to a line that has slope m, then the slope of the line is -1 / m
so if m=1/2
the slope of a perpendicular line will be m=-2
A plane is beginning its descent to the ground. After 3
minutes, the plane is at an altitude of 31,275', and after 7
minutes it is at an altitude of 22,975'. At what rate, in feet
per minute, is the plane descending?
Answers
Answer:
2075 ft/minute
Step-by-step explanation:
31,275 - 22,975 = 8300, this is the decrease in altitude over 4 minutes.
By dividing the change in position by time you can find the rate of change.
8300/4
= 2075 ft/minute
Sarah used 3.5 cups of cheese in a dish that serves 10 people. What constant of proportionality relates the number of servings to cups of cheese?
Group of answer choices
0.35
0.05
0.5
0.25
Answers
B. 0.05
pls mark brainleist
help me please
thank you
Answers
Answer:
(-7, 3)
Step-by-step explanation:
Since the endpoints of the interval are not included, use parentheses.
there were 943 tornadoes in 2013 and 897 in 2014. what% decrease was that using 2 decimal places?
Answers
decrease in tornadoes = 943-897 = 46
% decrease in tornadoes = (decrease in tornadoes) / (initial amount of tornadoes) x 100%
[tex]\begin{gathered} \frac{46}{943}\text{ }\times\text{ 100 = }\frac{460}{943}\text{ = 4.87805} \\ \approx\text{ 4.88 ( 2 decimal places )} \end{gathered}[/tex]Solve: 9(x-9) + 8 = -19
Answers
we have the equation
[tex]9\left(x-9\right)+8=-19[/tex]Solve for x
step 1
Apply distributive property on the left side
[tex]\begin{gathered} 9\left(x)-9(9\right)+8=-19 \\ 9x-81+8=-19 \end{gathered}[/tex]Combine similar terms on the left side
[tex]9x-73=-19[/tex]step 2
Adds 73 on both sides
[tex]\begin{gathered} 9x-73+73=-19+73 \\ simplify \\ 9x=54 \end{gathered}[/tex]step 3
Divide both sides by 9
[tex]\begin{gathered} \frac{9x}{9}=\frac{54}{9} \\ \\ x=6 \end{gathered}[/tex]The answer is x=6We do that by isolating the variable by dividing each side by factors without the variable in this case X.
write a two column proof
Answers
The two-column method is used to prove that AB = CD as follows;
Statement [tex]{}[/tex] Reasons
1. B is the midpoint of [tex]\overline{AC}[/tex] [tex]{}[/tex] Given
C is the midpoint of [tex]\overline{BD}[/tex] [tex]{}[/tex]
2. [tex]\overline{AB}[/tex] ≅ [tex]\overline{BC}[/tex] [tex]{}[/tex] [tex]{}[/tex] [tex]{}[/tex] 2. Definition of midpoint
3. [tex]\overline{BC}[/tex] ≅ [tex]\overline{CD}[/tex] [tex]{}[/tex] [tex]{}[/tex] [tex]{}[/tex] 3. Definition of midpoint to a segment
4. [tex]\overline{AB}[/tex] ≅ [tex]\overline{CD}[/tex] [tex]{}[/tex] [tex]{}[/tex] [tex]{}[/tex] 4. Transitive property of congruency
5. [tex]\overline{AB}[/tex] = [tex]\overline{CD}[/tex] [tex]{}[/tex] [tex]{}[/tex] [tex]{}[/tex] 5. Definition of congruent segments
What are the details of the definitions, and properties used to prove that the segments [tex]\overline{AB}[/tex] = [tex]\overline{CD}[/tex]?The midpoint of a segment in geometry is the point that bisects the line into two equal parts and serves as the centroid of the line. The distance from both ends of the segment to the midpoint are the same.
The transitive property of equality states that if a variable a equals a variable b and if the variable b equals the variable c then the variable a also equals the variable c.
Mathematically; If a = b, and b = c, then a = c
Two, segments, figures, or shapes in geometry are congruent if they have the same shape and size.
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