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2 years ago

Math questions 40 and 41!!

Mathematics

1 answer:

DerKrebs [107]2 years ago

8 0

The first expression could be written as 3x + 12 and the second could be written as 2x + 6.

In order to find these, count the number of x's you see in each question. Then use that number as the coefficient to x in your statement. The first problem has 3 and the second has 2.

Then add the numbers of 1's together to get the constants at the end of the expressions. The first has 12 and the second has 6.

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A market research analyst claims that 32% of the people who visit the mall actually make a purchase. You think that less than 32

Rainbow [258]

Answer:

E. -1.48

Step-by-step explanation:

The test statistic is:

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the expected value, $\sigma$ is the standard deviation and n is the size of the sample.

A market research analyst claims that 32% of the people who visit the mall actually make a purchase.

This means that:

$\mu = 0.32$

$\sigma = \sqrt{0.32*0.68} = 0.4665$

You stand by the exit door of the mall starting at noon and ask 82 people as they are leaving whether they bought anything. You find that only 20 people made a purchase.

This means that $n = 82, X = \frac{20}{82} = 0.2439$

The value of the test statistic is about:

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$t = \frac{0.2439 - 0.32}{\frac{0.4665}{\sqrt{82}}}$

$t = -1.48$

So the correct answer is given by option E.

3 0

2 years ago

Finding the Slope of a Line on a Graph

sukhopar [10]

Answer:

Slope = 2

Step-by-step explanation:

Change in y = 2

Change in x = 1

2/1 = 2

Equation: y = 2x + 3

5 0

2 years ago

I’m not sure which answer it is !??

Shkiper50 [21]

Answer:

Its A or B if not then sorry

Step-by-step explanation:

5 0

2 years ago

Determine the zeros of the function 2x^2-4x-6=0

muminat

X=3,-1 the roots are the (zeros)

6 0

2 years ago

Find the value of x to the nearest tenth

ivann1987 [24]

Since this is a right triangle and we have an angle and a side we can solve for any other side by using sohcahtoa. Now lets look at what we know we have the angle 35 degrees and the side adjacent to the angle is 10. we are looking for the side opposite to the angle. so we need a formula that uses opposite and adjacent that is toa, tan(angle)=oppisite/adjacent
now lets plug in tan(35)=x/10
x=10*tan(35)
x=7.002 now round to nearest tenth
x=7.0

7 0

2 years ago

Read 2 more answers