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Anuta_ua [19.1K]

2 years ago

5

Determine which of the following expressions requires combining like terms before it is considered to be in its simplest form. S

elect all situations that apply. 4x + 3y - 7x a2 + a2 - b 5y - x a2 + a2b -5w2 + y - 4w2 - 8y (8pq)

2 answers:

vovikov84 [41]2 years ago

4 0

Answer:

4x + 3y - 7xa2 + a2 - b

Step-by-step explanation:

its rite

polet [3.4K]2 years ago

3 0

4x + 3y - 7xa2 + a2 - b

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Laura earns $134,350 per year. Use Laura’s income tax rate to determine what her monthly deduction should be . ( the tax is 28%)

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Answer: Her refund would be $5,681.20.

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However, she had some deductions.
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3 years ago

Complete parts a through c for the given function.

victus00 [196]

Answer:

a. The critcal points are at

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b. Then, $x = -5$ is a maximum and $x=3$ is a minimum

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Step-by-step explanation:

(a)

Remember that you need to find the points where

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Therefore you have to solve this equation.

$20x^4 + 40x^3 - 300x^2 = 0$

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And you would also have $x^2 +2x-15 = 0$ .

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Therefore $x=-5 , x=3$ .

So the critcal points are at

$x=0,-5,3$

b.

Remember that a function has a maximum at a critical point if the second derivative at that point is negative. Since

$f''(x) = 80x^3 + 120x^2 -600x\\f''(-5) = 80(-5)^3 + 120(-5)^2 -600(-5) = -4000 < 0\\\\f''(3) = 80(3)^3 + 120(3)^2 -600(3) = 1440 > 0 \\$

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c.

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