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2 years ago

Find the sum and express it in simplest form (-y^3-y+1)+(-7y^3-6y-5)

Mathematics

1 answer:

Katen [24]2 years ago

4 0

Answer:

$( - {y}^{3} - y + 1) + ( - 7 {y}^{3} - 6y - 5) \\ = ( - 1 - 7) {y}^{3} - (1 + 6)y + (1 - 5) \\ = - 8 {y}^{3} - 7y - 4$

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I dont understand linear equations,what is the purpose of a linear equation?

Darina [25.2K]

A linear equation in two variables describes a relationship in which the value of one of the variables depends on the value of the other variable. In a linear equation in x and y, x is called x is the independent variable and y depends on it. We call y the dependent variable.

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2 years ago

Read 2 more answers

19. Rick shared his bag of grapes withfriends. He gave /210of the bag to Melissaand /410 of the bag to Ryan. What fractionof the

kvv77 [185]

Rick started with 10/10 of the grapes because he had all of them at the start.

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2 years ago

A geologist in South America discovers a

diamong [38]

Answer:

This is a radioactive decay / half-life problem.

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k = .0001 (that value should be negative)

Nt = No * e^ (k*t)

You need to solve that equation for "time" (equation attached)

time = natural log (Ending amount / Starting Amount) / k

time = natural log (57% / 100%) / -.0001

time = ln (.57) / -.0001

time = -.56211891815 / -.0001

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These problems are quite complicated but I think I know this pretty well.

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Step-by-step explanation:

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2 years ago

devin makes a 15% commission each month for everything he sells. if devin sells $2750 of merchandise this month, how much of a c

kakasveta [241]

Answer:

$412.50

Step-by-step explanation:

15% of 2750 = 0.15 × 2750 = 412.5

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2 years ago

Vanessa wants to earn an 85% grade in her Statistics class. She has one quiz left to take. On the first 4 quizzes, she received

grandymaker [24]

Answer: They would have to score an 88%

Step-by-step explanation:

1.) The mean of 84, 92, 83, and 78 is 337

2.) 337 divided by 4 is 84.25%

3.) If you add 88 to 337 and divide by 5, you get 85%

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2 years ago