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3 years ago

9

A rectangle is a rhombus.

2 answers:

ad-work [718]3 years ago

7 0

A triangle isn’t a rhombus!! Note that they are 2 different shapes with 2 different formulae to calculate area and a triangle is equilateral and a rhombus is quadrilateral

Soloha48 [4]3 years ago

4 0

False. It’s a quadrilateral.

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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

3 years ago

Use graph paper and a straightedge to draw the figure.

Norma-Jean [14]

The answer is b I think

8 0

3 years ago

Read 2 more answers

Determine the range of the function f(x)=x^2-2/2 when the domain is {0, 2}.<br> HELP

lawyer [7]

The range of function is { -1, 1 }

<em><u>Solution:</u></em>

Given that, the function is:

$f(x) = \frac{x^2-2}{2}$

Domain is {0, 2 }

We have to find the range of function

The domain refers to the set of possible input values

The range is the set of possible output values

Here domain is x = 0 and x = 2

<em><u>Substitute x = 0 in given function</u></em>

$f(0) = \frac{0-2}{2}\\\\f(0) = \frac{-2}{2}\\\\f(0) = -1$

<em><u>Substitute x = 2 in given function</u></em>

$f(2) = \frac{2^2-2}{2}\\\\f(2) = \frac{4-2}{2}\\\\f(2) = \frac{2}{2} = 1$

Thus the range of function is { -1, 1 }

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3 years ago

Solve the inequality-6 + x > 14

Rufina [12.5K]

Answer:

-6+X>14

+6 +6

X>20

Step-by-step explanation:

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3 years ago

What is the vertex of the function y=-4|x+2| + 5

Fittoniya [83]

The vertex of the function is (-2,5)

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3 years ago