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nlexa [21]
2 years ago
13

Please answer this and I’ll make you Brainly

Mathematics
1 answer:
murzikaleks [220]2 years ago
3 0

Answer:

-4 = ?

Step-by-step explanation:

<u>Step 1:  Substitute -1 for x</u>

7x^3 + 5x^2 - 2 = ?

7(-1)^3 + 5(-1)^2 - 2 = ?

7(-1) + 5(1) - 2 = ?

-7 + 5 - 2 = ?

-4 = ?

Answer: -4 = ?

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He drew 15 in the art class.                     
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How many gallons of paint would you need to paint a dog house that is 372ft in total?
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It would be 44gallons
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A researcher surveyed 220 residents of a city about the number of hours they
olga55 [171]

Answer:

Margin of error of 0.0485 hours.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.025 = 0.975, so Z = 1.96.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

In this question:

\sigma = 0.35, n = 220

The margin of error is of:

M = z\frac{\sigma}{\sqrt{n}}

M = 1.96\frac{0.35}{\sqrt{200}}

M = 0.0485

Margin of error of 0.0485 hours.

5 0
3 years ago
a large basket of apples weighed 10 2/3lb. if the weight of the basket was 1 1/4lb, how much did the apples weigh?
dolphi86 [110]

A large basket of apples weighed 10 2/3lb

Basket was 1 1/4lb

Apples weigh = 10 2/3 - 1 1/4

Apples weigh = 10 8/12 - 1 3/12

Apples weigh = 9 5/12

Answer

Apples weighed 9 5/12 lbs

7 0
3 years ago
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For each triangle, find the value of x and find the missing angle​(s)
Vikki [24]

Answer:

71° = m∠G

54° = m∠T

10 = x

Step-by-step explanation:

Use the Triangular Interior Angles Theorem to figure this out:

180° = [7x + 1]° + [6x - 6]° + 55°

180° = [−5 + 13x]° + 55°

180° = [50 + 13x]°

-50° - 50°

____________

\frac{130°}{13} = \frac{[13x]°}{13} \\ \\ 10° = x

You then plug this back into all three expressions to get 71° as the measure of ∠G and 54° as the measure of ∠T.

I am joyous to assist you anytime.

8 0
3 years ago
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