3 years ago

Describe how the area of a rectangle will change if its width remains

Mathematics

1 answer:

ella [17]3 years ago

6 0

Answer:

its the 2nd one

Step-by-step explanation:

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Solve the Inequality and express each solution in set interval notation.

solniwko [45]

The correct answer is x=5

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3 years ago

The Department of Transportation would like to test the hypothesis that the average age of cars on the road is less than 12 year

puteri [66]

Answer:

$z=\frac{10.6-12}{\frac{4.1}{\sqrt{45}}}=-2.29$

Step-by-step explanation:

information given

$\bar X=10.6$ represent the sample mean

$\sigma=4.1$ represent the population standard deviation

$n=45$ sample size

$\mu_o =12$ represent the value that we want to test

$\alpha=0.05$ represent the significance level for the hypothesis test.

z would represent the statistic

$p_v$ represent the p value for the test

Hypothesis to test

We want to test if the true mean is less than 12, the system of hypothesis would be:

Null hypothesis: $\mu \geq 10$

Alternative hypothesis: $\mu < 10$

The statistic is given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

Replacing the info given we got:

We can replace in formula (1) the info given like this:

$z=\frac{10.6-12}{\frac{4.1}{\sqrt{45}}}=-2.29$

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3 years ago

A man who is X years old now has a son aged 5 years. In 7 years the father will be 4 times as old as his son will be then . How

Stella [2.4K]

Answer:

Step-by-step explanation:

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2 years ago

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What is the area of the rectangular piece of wood?

Mama L [17]

Answer:

2x^2 + 7x + 3 is the area of the rectangular piece of wood.

Step-by-step explanation:

Here,

Length ( l ) = x + 3

Breadth ( b ) = 2x + 1

Formula : -

Ar ( rectangle ) = lb

= ( x + 3 ) ( 2x + 1 )

= x ( 2x + 1 ) + 3 ( 2x + 1 )

= 2x^2 + x + 6x + 3

= 2x^2 + 7x + 3

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3 years ago

Find the area of the following figure:

Alinara [238K]

Answer:

9 square inches is your answer. √9=3

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2 years ago