8 i believe hope it helps!
7/9
Because-2/3 + 13-9=7/9 and by the way use the app Photomath and it gives you the answer and how to solve it
To find the answer, move the decimal point over until you reach the final number. Move it to the right of that, and then count how many places you had to move over and write that as the exponent to 10. So the answer is A because you moved the decimal point 21640. <- here over 4 places, then you lose the zero.
Hi! :)
12 a^2 + 60 a - 8
- (16 a^2 - 32 a + 9)
= -4 a^2 + 92 a - 17