Solve the inequality 7x ≥ –7

Answer:

2x^2 -8x

Step-by-step explanation:

2x(x-4)

Distribute

2x*x -2x*4

2x^2 -8x

The right answer is 2x^2-8x

please see the attached picture for full solution

Hope it helps

good luck on your assignment

Answer: The answer is provided below

Step-by-step explanation:

Statistical Process Control (SPC) is described as the applied side of binomial, poisson, and the normal distributions. It has been often said that an X-bar control chart is a normal distribution that is turned on its side. Some people argue that statistics shouldn’t cover these applications because it represent an analytical skill rather than statistical technique. It's an application of what is learnt on statistics.

Statistical Process Control(SPC) is very useful in our lives. As a statistics student, one should be thorough with every mathematical concepts and its applications.

Answer:

[tex] \bar X \sim N (\mu ,\frac{\sigma}{\sqrt{n}})[/tex]

Then the mean would be:

[tex] \mu_{\bar X}= 2.02[/tex]

And the deviation:

[tex] \sigma_{\bar X}= \frac{3.00}{\sqrt{45}}= 0.447[/tex]

And the distribution would be given by:

[tex] \bar X \sim N(2.02, 0.447)[/tex]

Step-by-step explanation:

For this case we can define the variable of interest X as the amount of change in UF student's pockets and we know the following parameters:

[tex] \mu = 2.02, \sigma =3.00[/tex]

And we select a sample of n=45. Since this sample size is higher than 30 we can apply the central limit theorem and the distirbution for the sample size would be given by:

[tex] \bar X \sim N (\mu ,\frac{\sigma}{\sqrt{n}})[/tex]

Then the mean would be:

[tex] \mu_{\bar X}= 2.02[/tex]

And the deviation:

[tex] \sigma_{\bar X}= \frac{3.00}{\sqrt{45}}= 0.447[/tex]

And the distribution would be given by:

[tex] \bar X \sim N(2.02, 0.447)[/tex]

Answer: 5

Step-by-step explanation:

sqrt of 100 = 10

10/2 = 5

Answer:

x = 37.4

Step-by-step explanation:

Answer:

37.4

Step-by-step explanation:

If you plug in 157, we get 5x-157=30. Then we will add 157 to both sides to get 5x=187 and then divide by 5 on both sides leaving x on one side and the answer on the other so, 187/5=37.4.

Hope this helps!!! PLZ MARK BRAINLIEST!!!

Answer:

7.61

Step-by-step explanation:

Sum all of the values

2.22+2.97+2.42=7.61

Answer:

761

Step-by-step explanation:

Answer:

120

Step-by-step explanation:

Answer:

Step-by-step explanation:

A quadrilaterals are plane figures bounded by four sides. Examples are; square, rectangle, parallelogram, kite, trapezium etc.

Given: parallelogram WXYZ

           ZX ≅ WY

Prove: WXYZ is a rectangle

WZ ≅ XY (opposite sides property)

YZ ≅ WX (opposite sides property)

<WZY ≅ <ZWX ≅ <WXY ≅ <XYZ = [tex]90^{0}[/tex] (angle property of a rectangle)

<YZW ≅ <WXY (opposite angles are congruent)

ΔZYW ≅  ΔXTW (Side-Angle-Side property)

ZX ≅ WY

Therefore, the parallelogram is a rectangle.

Answer: This is the right answer

Step-by-step explanation:

Below

Answer:

(a)f(0)=-3

(b)f(1)=-1

(c)f(5)=7

(d)f(6)=211

Step-by-step explanation:

[tex]f(x)=\left\{\begin{array}{ccc}2x-3, &-2\leq x \leq 5 \\x^3-5, &5<x\leq6 \end{array}\right[/tex]

(a) f(0)

For x such that , [tex]-2\leq x \leq 5, f(x)=2x-3[/tex]

Since [tex]-2\leq 0\leq 5[/tex]

[tex]f(0)=2(0)-3=0-3\\f(0)=-3[/tex]

(b)f(1)

For x such that , [tex]-2\leq x \leq 5, f(x)=2x-3[/tex]

Since [tex]-2\leq 1\leq 5[/tex]

[tex]f(1)=2(1)-3=2-3\\f(1)=-1[/tex]

(c)f(5)

For x such that , [tex]-2\leq x \leq 5, f(x)=2x-3[/tex]

Since [tex]-2\leq 5\leq 5[/tex]

[tex]f(5)=2(5)-3=10-3\\f(5)=7[/tex]

(d)f(6)

For x such that [tex]5<x\leq6, f(x)=x^3-5[/tex]

[tex]f(6)=6^3-5\\f(6)=211[/tex]

Answer:

the surface area should be 544 (whatever the unit is)

Step-by-step explanation:

You start by taking the rectangles on the side and finding their area.

1. (10×14)×2 ←Because there are two rectanglular sides.

2. find the area of the triangles on the side. 1/2bh = area of triangle.

(.5×8×6)×4 ← in order to find the area for all of the triangles.

3.  lastly take the base of the prism and find the area then add the previously found values together.

(12×14)+(.5×8×6)×4+ (10×14)×2 = 544

Answer:

544

Step-by-step explanation:

It is right on Khan academy so I hope this helps!!!

Answer:

30

Step-by-step explanation:

Answer:

240 table tops or none

Step-by-step explanation:

p(x) = 480x- 2x^2

For profit to be 0, it means;

p(x)= 0

Therefore 480x- 2x^2 = 0

Dividing through by 2 we have ;

240x - x^2 = 0

By factorisation of x we have ;

(240-x) x = 0

x = 0 or 240-x= 0; x= 240( by moving x to the right of the expression:240-x= 0; we have 240=x => x=240).

So the company needs to produce 240 table tops or none in order not to make a profit.

The company need to make a profit of zero dollars will be 240.

A monetary profit, particularly the distinction between the amount gained and the actual cost of purchasing, running or creating anything.

The profit a company makes from producing x tabletops is modeled by the equation is given as,

p(x) = 480x – 2x²

Then the company need to make a profit of zero dollars will be

p(x) = 0

480x – 2x² = 0

2x(240 – x) = 0

                x = 0, 240

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Answer:

(7-2x)3 =9-10x

x= -3

Step-by-step explanation:

we let the number to be x.

twice a number=2x is decreased by 7 that is to say 7-2x, is multiplied by 3, we have (7-2x)3.

the result is 9 less than 10times the number which is =9-10x.

so bringing all these together we have;

(7-2x)3=9-10x.

what is the number?

solving, we have:

(7-2x)3=9-10x

21-6x=9-10x

21-9= -10x+6x

12= -4x

dividing both sides by -4 we have our number

x= -3.

for proof we can substitute x=-3 into the equation.

21-6(-3) =9-10(-3)

21+18=9+30

39=39

Answer :

34.56

I hope it helps

Answer:

27

Step-by-step explanation:

Any positive integer to 3rd power will have positive answer.

Odd functions with number next to x^3 that is positive are increasing from left to right and thay also have a rotational symmetry with respect to the origin.Whe you put this together it's clear that the answer is 27

Answer:

[tex]t=\frac{10345-10460}{\frac{1540}{\sqrt{900}}}=-2.24[/tex]    

The degrees of freedom are given by:

[tex]df=n-1=900-1=899[/tex]  

The p value for this case would be given by:

[tex]p_v =2*P(t_{(899)}<-2.24)=0.0127[/tex]  

The p value is low and if we use a significance level of 0.05 we can reject the null hypothesis and we can conclude tha the true mean is different from 10460

Step-by-step explanation:

Information given

[tex]\bar X=10345[/tex] represent the mean height for the sample  

[tex]s=1540[/tex] represent the sample standard deviation for the sample  

[tex]n=900[/tex] sample size  

[tex]\mu_o =10460[/tex] represent the value to verify

t would represent the statistic

[tex]p_v[/tex] represent the p value for the test

Hypothesis to test

We want to verify if the true mean is equal to 10460, the system of hypothesis would be:  

Null hypothesis:[tex]\mu = 10460[/tex]  

Alternative hypothesis:[tex]\mu \neq 10460[/tex]  

The statistic is given by:

[tex]t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}[/tex]  (1)  

Replacing the info given we got:

[tex]t=\frac{10345-10460}{\frac{1540}{\sqrt{900}}}=-2.24[/tex]    

The degrees of freedom are given by:

[tex]df=n-1=900-1=899[/tex]  

The p value for this case would be given by:

[tex]p_v =2*P(t_{(899)}<-2.24)=0.0127[/tex]  

The p value is low and if we use a significance level of 0.05 we can reject the null hypothesis and we can conclude tha the true mean is different from 10460

Answer:

4( x+6) (x-1)

Step-by-step explanation:

4x^2+20x-24

Factor out the greatest common factor

4(x^2 +5x-6)

What 2 numbers multiply to -6 and add to 5

6*-1 = -6

6+-1 = 5

4( x+6) (x-1)

Answer:

[tex]4(x-1)(x+6)[/tex]

Step-by-step explanation:

→Take out the GCF (Greatest Common Factor), which is 4:

[tex]4x^2+20x-24[/tex]

[tex]4(x^2+5x-6)[/tex]

→Split the middle term into two numbers that can be added to get 5 and multiplied to get 6:

[tex]4(x-1)(x+6)[/tex]

Answer:

90 degree

Step-by-step explanation:

Three points A, B, and C are added and shown in attached picture.

As the property of inscribed angle in circle:

angle BAC = (1/2) x 88 = 44 deg

As the property of complement angle:

angle ABC = 180 - 89 = 91 deg

As the property of sum of three angles in a triangle:

angle ACB + angle ABC + angle BAC = 180 deg

=> angle ACB = 180 - angle ABC - angle BAC = 180 - 44 - 91 = 45 deg

One more time, we use the property of inscribed angle in circle:

x = 2 x angle ACB = 2 x 45 = 90 deg

Hope this helps!

Answer:

over 90 percent said that the experience was a key influence on the direction of their lives.

Step-by-step explanation:

This is the most helpful reason to implement study abroad programs in high schools.

Answer:

C

Step-by-step explanation:

i took the test

Answer:

5.25 kilometers

Step-by-step explanation:

63k/60 = 1.05k

1.05k x 5 = 5.25k

Answer:

x - 15 = 30

x = 45

Step-by-step explanation:

Answer:

D: 200

Step-by-step explanation:

1/5x-2/3 times 15=30

Simplify each term

x/5 -10=30

Move all terms not containing x to the right side of the equation

x/5=40

Multiply both sides of the equation by 5

5 times x/5=5 times 40

Simplify both sides of the equation

x=200

Hope this helped!

Answer:

  -1

Step-by-step explanation:

The average rate of change is the ratio of the difference in y-values to the difference in x-values of corresponding points.

At x=-1, f(x) = (-1)^2 -(-1) -1 = 1

At x=1, f(x) = (1)^2 -(1) -1 = -1

So, points on the graph are (-1, 1) and (1, -1).

Then the change in y over that interval is -1 -1 = -2.

The change in x over that interval is 1 -(-1) = 2.

The average rate of change is ...

  ∆y/∆x = -2/2 = -1 . . . . average rate of change on (-1, 1)

Answer:

The initial amount of cupcakes = 48

If they sold each cupcake for $2.75, they would make $132 which is more than the required $100 to go on band field trip to New York.

The excess money available for spending is thus $32

Step-by-step explanation:

The complete question is presented in the attached image to this answer.

They need to make $100

Let x be the initial amount of cupcakes

During the first hour, Brady sold (1/3) of the cupcakes and Jaquan sold (3/8)

Total amount of cupcakes sold in the first hour = [(1/3) × x] + [(3/8) × x] = (17x/24)

Amount of cupcakes remaining after the first hour = x - (17x/24) = (7x/24)

After the first hour, they sold 2 cupcakes

Amount of cupcakes left after the first hour = (7x/24) - 2 = (0.292x - 2)

During the second hour, they sold 75% of the remaining cupcakes, meaning they had 25% of the remaining cupcakes left.

Amount of cupcakes left = 25% × (0.292x - 2)

= (0.07292x - 0.5)

During the third hour, they sold the remaining 3 cupcakes

Meaning that the amount of cupcakes left from the second hour = 3

(0.07292x - 0.5) = 3

0.07292x = 3.5

x = (3.5/0.07292) = 47.998 = 48 cupcakes.

Hence, the initial amount of cupcakes = 48.

If they sold each cupcake for $2.75, they would make 2.75 × 48 = $132

Which is more than the required $100 to go on band field trip to New York.

The excess money available for spending is thus $132 - $100 = $32.

Hope this Helps!!!

Answer:

Marisol made $138.75 on the sale of the jacket

Step-by-step explanation:

First we are told that Fernando bought a jacket for $185, and sold it for 1 1/12 what he paid.

Therefore, 1 1/2 of 185;

= 1.5 × 185 = $277.5

Therefore, Fernando sold the Jacket for $277.5

Next, we are told that:

Marisol spent 1/5 as much as Fernando on the same jacket

This means that Marisol spent 1/5 of $185 on the jacket

= 1/5 × 185 = 0.2 × 185 = $37

Therefore, Marisol spent $37 to buy the same jacket

Next, Marisol sold the jacket for 1/2 as much as Fernando. Since Fernando sold the Jacket for $277.5, Marisol sold the jacket for 1/2 of 277.5, and this is calculated as:

1/2 of 277.5 = 0.5 × 277.5 = 138.75

Therefore, Marisol made $138.75 on the sale of the jacket.

Answer: 14

Step-by-step explanation:

Answer:

$607.57

Step-by-step explanation:

Answer:

13.44% probabilith that at most 3 are in excellent health.

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they are in excellent health, or they are not. The probability of an adult being in excellent health is independent of other adults. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]

In which [tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.

[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]

And p is the probability of X happening.

43% of adults questioned reported that their health was excellent.

This means that [tex]p = 0.43[/tex]

13 adults randomly selected

This means that [tex]n = 13[/tex]

Find the probability that when 13 adults are randomly selected, at most 3 are in excellent health.

[tex]P(X \leq 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3)[/tex]

In which:

[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]

[tex]P(X = 0) = C_{13,0}.(0.42)^{0}.(0.58)^{13} = 0.0008[/tex]

[tex]P(X = 1) = C_{13,1}.(0.42)^{1}.(0.58)^{12} = 0.0079[/tex]

[tex]P(X = 2) = C_{13,2}.(0.42)^{2}.(0.58)^{11} = 0.0344[/tex]

[tex]P(X = 3) = C_{13,3}.(0.42)^{3}.(0.58)^{10} = 0.0913[/tex]

[tex]P(X \leq 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) = 0.0008 + 0.0079 + 0.0344 + 0.0913 = 0.1344[/tex]

13.44% probabilith that at most 3 are in excellent health.

Answer:

462 ft²

Step-by-step explanation:

The area of the annulus sector is given by the area of the outer circle (radius of 14 ft) minus the area of the inner circle (radius of 7 ft).

The area of a circle is:

[tex]A=\pi r^2[/tex]

Therefore, the area of the annulus sector is:

[tex]A_A=A_O-A_I\\A_A=\pi*14^2-(\pi*7^2)\\A_A=147\pi\\A_A= 462\ ft^2[/tex]

The area, rounded to the nearest square foot, is 462 ft².

Answer:

f(x) has a slope of -1 and has a range of all real numbers.

Step-by-step explanation:

A linear function is a continuous function, so that exist a range value for all value of the domain, which corresponds to all real numbers. Regarding the function described above, the y- and x-intercepts are, respectively:

x-Intercept

[tex]0 = - x-24[/tex]

[tex]x = -24[/tex]

f(x) has a x-intercept of (-24,0).

y-Intercept

[tex]f(x) = 0 - 24[/tex]

[tex]f(x) = -24[/tex]

f(x) has a y-intercept of (0, -24).

Lastly, the linear function has a slope of -1.

Answer:

D AND E

Step-by-step explanation:

edu I took it

Answer:

b. (-8, -2)

Step-by-step explanation:

Reflection across the x-axis

(x, y) ---> (x, -y)

B'(- 8, 2) ---> B( - 8, -2)

The coordinates of the pre image of B is (-8,-2) by studying the given graph.

The given figure ABCD is reflected across the x-axis to create the figure A'B'C'D'.

By referring the graph we can say that the coordinate of B' is (-8,2)

The reflected point will have y coordinate's sign changed as the figure is reflected across x-axis.

Thus the pre image of B' will be (-8,-2)

Hence the coordinates of the pre image of B' is (-8,-2)

Learn more about coordinate system here:

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