Question

fill in the blank 1 point write an expression that is equivalent to ((10 + 7r - r^2) + (-6r^2 - 18 + 5r))? when selecting your answer be sure to your answer is in standard form. move the correct answer to each box. not all answers will be used.

Explanation:

Step1: Remove parentheses

$10 + 7r - r^2 - 6r^2 - 18 + 5r$

Step2: Combine like $r^2$ terms

$-r^2 - 6r^2 = -7r^2$

Step3: Combine like $r$ terms

$7r + 5r = 12r$

Step4: Combine constant terms

$10 - 18 = -8$

Step5: Write in standard form

Arrange terms by descending degree: $-7r^2 + 12r - 8$

Answer:

$-7r^2 + 12r - 8$