Question

Evaluate 2a^2 - 10 ÷ b for a = 3 and b = 5.

Answer 1

so if a = 3
how much is a^2?
a*a right?
that would be 3*3 = 9
so we have to find
2a^2
How much would that be?

Answer 2

12?

Answer 3

Why do you say that? :D

Answer 4

2 times 3 times 3 = 12 ;O

Answer 5

3 times 3 is 9
and so 2 times 3 times 3 would be
2 times 9
And that would be?

Answer 6

18!

Answer 7

Correct! :D
Now I want to know one thing does the equation say
the whole thing is divided by b or just is it just 10 divided by b?

Answer 8

- 10 divided by B

Answer 9

good!
So how much is -10/b when b is 5?

Answer 10

-2?

Answer 11

Correct and so our final answer is
18-2 = 16!! :D
[SOLVED] :)

Answer 12

thank you C:

Answer 13

:)