(12y2
+ 17y - 4) + (9y2
- 13y + 3) =

Step-by-step explanation:

Hello!

For this, we can combine like terms

17y - 13y = 4y

-4 + 3 = -1

Combine the answers and we get

Hope this Helps!

21y² + 4y -1

Step-by-step explanation:

(12y² + 17y - 4) + (9y² - 13y + 3)   remove parentheses

= 12y² + 17y - 4y + 9y² - 13y + 3

= 12y² + 9y² + 17y - 13y - 4 + 3  grouped like terms

= 21y² + 17y - 13y - 4 + 3

= 21y² + 4y - 4 + 3

= 21y² + 4y - 1

answer: .75 km

step-by-step explanation:

step-by-step explanation:

a and d