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3 years ago

-14<7x<21 solve the inequality and graph the solution

1 answer:

6 0

To solve, divide by 7.
-2 < x < 3

The graph is a number line with open circles at -2 and 3 and a solid line between them.

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A marketing consultant observed 40 consecutive shoppers to estimate the average money spent by shoppers in a supermarket store.

KonstantinChe [14]

Answer:

0.998 is the probability that the average money spent by a sample of 40 shoppers is within $10 of the actual population mean.

Step-by-step explanation:

We are given the following information in the question:

Standard Deviation, σ = $21.51

We are given that the distribution of average money spend is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}$

We have to find:

P( average money spent is within $10 of the actual population mean.)

$= P( z \leq \displaystyle\frac{10\times \sqrt{40}}{21.51}}) = P(z \leq 2.94)$

Calculation the value from standard normal z table, we have,

$P(z \leq 2.94) = 0.998$

6 0

3 years ago

Can somebody please give me the answer I will mark u brilliant

VARVARA [1.3K]

Answer:

x = 6.7

Step-by-step explanation:

We know that 3.5 + x = 10.2, so if we do inverse operations we can find out the value of x.

10.2 - 3.5 = 6.7

we can check our work by substituing it back in the equation for x

6.7 + 3.5 = 10.2

so now we know that x = 6.7. I hope this helps :)

7 0

3 years ago

Read 2 more answers

On a horizontal number line, numbers are what

Vikentia [17]

Answer:

to the right of zero if postive if negative left

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2 years ago

Read 2 more answers

Select the correct answer.

mariarad [96]

Answer:

D. slope: 3

y-intercept: -3

Step-by-step explanation:

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3 years ago

Find the measure of the missing angle.

Nostrana [21]

180 minus 90 equals 90, divided by 2, the answer is 45 degrees

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3 years ago