Question

simplify (7t^2+9)+(6t^2+8)

Answer 1

you can take away the parens
7t^2+9+6t^2+8

you are adding so you can change the order
7t^2+6t^2+9+8

you can put parens back in
(7t^2+6t^2)+ (9+8)

now you should know 9+8

and to do the t^2 terms: if you have 7 t^2 's and add 6 more, how many t^2's do you have ?

Answer 2

7?

Answer 3

the answer choices are t2 + 1
13t2 + 17
13t4 + 17
42t2 + 72

Answer 4

13t^2+17

Answer 5

Because .....
7t^2+9
+ 6t^2+8
= 13t^2+17