Which polynomial represents the sum below? (18x2 - 18) + (-13x2 - 13x + 13) a. 18x2 - 31x - 18 b. 31x2 - 31x - 5 c. 5x2 - 13x - 5 d. 5x2 - 13x - 31

Option C

Step-by-step explanation:

There are two polynomials given ( 18x² - 18) and 13x² - 13x + 13)

Now we have to add them

(18x² - 18) + (-13x² - 13x + 13)

First we collect the like terms

18x² - 18 - 13x² - 13x + 13

(18x² - 13x²) - 13x + (13 - 18)

5x² - 13x -5

Option C is the answer.

answer: hi

step-by-step explanation:

answer: 7 x 2/5 = 2.8 hours, is your answer. your welcome! : 3

step-by-step explanation: first work out how long it took to hose 1/7 of the lawn which is 2/5 hours. times that by 7 to get the whole lawn.

sorry i don't know the other answer. i didn't learn what a proportional relationship is.