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4 years ago

5

50 Points!

1 answer:

Vilka [71]4 years ago

3 0

Answer: $\bold{a)\quad -2x^6+3x^4+3x^3-3x^2+11x+20\qquad b)\quad YES}$

<u>Step-by-step explanation:</u>

a)

$(-2x^6+x-5)(x^3-3x-4)\\\\\text{Use distributive Property to multiply:}\\-2x^3(x^3-3x-4)+x(x^3-3x-4)-5(x^3-3x-4)\\\\.\ -2x^6+2x^4+8x^3\\+\qquad \quad +x^4\qquad \quad -3x^2-4x\\+ \underline{\qquad \qquad \qquad -5x^3\quad \quad+15x+20}\\= -2x^6+3x^4+3x^3-3x^2+11x+20$

b)

When multiplying, the order doesn't matter: 2 × 3 = 3 × 2

This is referred to as "Commutative Property of Multiplication"

So, (-2x⁶+x-5)(x³-3x-4) = (x³-3x-4)(-2x⁶+x-5)

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Working at home: According to the U.S Census Bureau, 41% of men who worked at home were college graduates. In a sample of 506 wo

sergejj [24]

Solution :

a). The point estimate of proportion of college graduates among women who work at home,

$\hat p =\frac{166}{506}$

= 0.3281

99.5% confidence interval

$=\left( \hat p \pm Z_{0.005/2} \sqrt{\frac{\hat p (1- \hat p)}{n}} \right)$

$=\left( 0.3281 \pm 2.81 \sqrt{\frac{0.3281 \times (1- 0.3281)}{506}} \right)$

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3 years ago

Write 2^40 as a power with the following base<br> a) 2^2<br> b)2^5<br> c)2^8<br> d)2^10

Akimi4 [234]

Answer:

2^2×20

Step-by-step explanation:

2^2×20

because 2×20=40

so, 2^2×20=2^40

3 0

2 years ago

Select all side lengths that could be the sides of a triangle.

QveST [7]

Answer:

25

Step-by-step explanation:

3 0

3 years ago

gayaneshka [121]

A+3=B

17+3=B=20

B equals 20 when A equals 17

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3 years ago

Anthony rolled a six-sided die 138 times. Predict how many times you expect the die to have rolled on a 6?

Crazy boy [7]

Answer:

It can be 23 or 823

Step-by-step explanation:

Depends because if you divide 138 and 6 you'll get 23.

If you multiply 138 times 6 you'll get 823

6 0

3 years ago