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2 years ago

Simplify: 3 [(5-2)3 + 4] O A. 63 O B. 43 O c. 39 D. 31 E. 13

Mathematics

2 answers:

artcher [175]2 years ago

7 0

Answer:

C. 39

Step-by-step explanation:

FromTheMoon [43]2 years ago

3 0

The correct answer is the his

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Draw a picture to show how 2/3 of jakes pizza can be equal to 3/6 of a pizza from als

Harlamova29_29 [7]

2/3 of a pizza is more than half of the pizza.

3/6 = 1/2, so 3/6 of a pizza is exactly half of the pizza.

Given that two pizzas are of different sizes you need to calculate the areas of each pizza and compare them.

Assumming that the two pizzas are circular, you can calculate the area of each pizza from the formula of the area for a circle:

Area of a circle = π * (radius)^2.

Call r the radius of Jake's pizza and R the radius of Al's pizza. Then:

Area of Jake's pizza = π (r^2) and 2/3 of that is: 2π(r^2) / 3.

Area of Al's pizza = π (R^2) and 1/2 of that is π(R^2)/2

So, what you have to do is to use the radius of each pizza, calculate above formulaes and verify whether the results are the same or not.

3 0

3 years ago

The center of the circle is O. Find the measure of angle BDE *

lorasvet [3.4K]

Answer:

90 (angle in a semicircle)

7 0

3 years ago

Read 2 more answers

) The National Highway Traffic Safety Administration collects data on seat-belt use and publishes results in the document Occupa

asambeis [7]

Answer:

We conclude that there is a difference in seat belt use.

Step-by-step explanation:

We are given that of 1,000 drivers 16-24 years old, 79% said they buckle up, whereas 924 of 1,100 drivers 25-69 years old said they did.

Let $p_1$ = population proportion of drivers 16-24 years old who buckle up .

$p_2$ = population proportion of drivers 25-69 years old who buckle up .

So, Null Hypothesis, $H_0$ : $p_1-p_2$ = 0 {means that there is no significant difference in seat belt use}

Alternate Hypothesis, $H_A$ : $p_1-p_2\neq$ 0 {means that there is a difference in seat belt use}

The test statistics that would be used here Two-sample z proportion statistics;

T.S. = $\frac{(\hat p_1-\hat p_2)-(p_1-p_2)}{\sqrt{\frac{\hat p_1(1-\hat p_1)}{n_1}+\frac{\hat p_2(1-\hat p_2)}{n_2} } }$ ~ N(0,1)

where, $\hat p_1$ = sample proportion of drivers 16-24 years old who buckle up = 79%

$\hat p_2$ = sample proportion of drivers 25-69 years old who buckle up = $\frac{924}{1100}$ = 84%

$n_1$ = sample of 16-24 years old drivers = 1000

$n_2$ = sample of 25-69 years old drivers = 1100

So, test statistics = $\frac{(0.79-0.84)-(0)}{\sqrt{\frac{0.79(1-0.79)}{1000}+\frac{0.84(1-0.84)}{1100} } }$

= -2.946

The value of z test statistics is -2.946.

Since, in the question we are not given with the level of significance so we assume it to be 5%. Now, at 0.05 significance level the z table gives critical values of -1.96 and 1.96 for two-tailed test.

Since our test statistics doesn't lie within the range of critical values of z, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which we reject our null hypothesis.

Therefore, we conclude that there is a difference in seat belt use.

4 0

3 years ago

I WILL MARK BRAINLIEST

Ber [7]

Answer:

N is (8,5)

Step-by-step explanation:

Find the difference between M, and A, then add it to the M coordinates

The difference between M (x) and A (x) is 3, so you have to add 3 to M's x coordinate to get the N's x coordinate.

Do the same for the y coords and you will get (8,5)

5 0

2 years ago

Luis starts to do a division problem and notices that there is a pattern in the digits to the right of the decimal point.This nu

Assoli18 [71]

Answer: Rational

Step-by-step explanation:

5 0

3 years ago