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3 years ago

8 in. 8 in. 8 in. Find the area of the figure above. [?] in2

Mathematics

1 answer:

RideAnS [48]3 years ago

5 0

Answer:

Step-by-step explanation:

Total area = area of cube + area of triangle

A = 8² + = 64 + 32 = 96 in

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I can't figure this one out.

mezya [45]

Answer:

I'm pretty sure the answer is B. x+6

Step-by-step explanation:

a polynomial with two terms (x and 6) is called a binomial. bi means two, so your answer would have two terms! hope this helped :)

5 0

3 years ago

For the functions f(x)=3x−1 and g(x)=4x−3, find (f∘g)(x) and (g∘f)(x)

motikmotik

(f°g)(x)=12x-10

(g°f)(x)= 12x-7

Hope this helps

8 0

3 years ago

PLEASE HELP

Svetradugi [14.3K]

Answer:

= 2x²( 2x+ 1) + 2x

= 2x (2x² + x + 1)

Step-by-step explanation:

Given in the question two functions,

f ( x ) = 9x³ + 2x² − 5x + 4

g ( x ) = 5x³ − 7 x + 4

To find,

f ( x ) − g ( x )

Substitute each functions

= 9x³ + 2x² − 5x + 4 - ( 5x³ − 7 x + 4 )

Remove parentheses

= 9x³ + 2x² − 5x + 4 - 5x³ + 7 x - 4

Combine like terms and add them up

= 4x³ + 2x² + 2x

Factorise

= 2x²( 2x+ 1) + 2x

= 2x (2x² + x + 1)

So the final answer in factored form is 2x²( 2x+ 1) + 2x or 2x (2x² + x + 1)

This can't be further factorise because answer will be in complex numbers

8 0

3 years ago

PLEASE PLEASE HELP. I will make you brainlest.

zvonat [6]

Answer: 15 √ 2

Step-by-step explanation:

Equilateral triangles have three equal side lengths, three equal angles of 60 degrees, and three equal altitudes.

You would think that the height of an equilateral triangle would also be equal to it's sides, but it's not. The formula for height is: side/2 x √3

10√6 / 2 * √ 3 = 15 √ 2

The decimal form: 21.2

4 0

3 years ago

A researcher wants to estimate the percentage of all adults that have used the Internet to seek pre-purchase information in the

Lubov Fominskaja [6]

Answer:

The required sample size for the new study is 801.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

25% of all adults had used the Internet for such a purpose

This means that $\pi = 0.25$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

What is the required sample size for the new study?

This is n for which M = 0.03. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.96\sqrt{\frac{0.25*0.75)}{n}}$

$0.03\sqrt{n} = 1.96\sqrt{0.25*0.75}$

$\sqrt{n} = \frac{1.96\sqrt{0.25*0.75}}{0.03}$

$(\sqrt{n})^2 = (\frac{1.96\sqrt{0.25*0.75}}{0.03})^2$

$n = 800.3$

Rounding up:

The required sample size for the new study is 801.

4 0

3 years ago