Question

What is the value of the expression below when b = 4 and c=5?

8b2 - 6c + 9
A 48
B79
107
D 888

Answer 1

107

Explanation:

8b^2 - 6c + 9

Let b=4 and c=5

8*(4)^2 -6(5)+9

Exponents first

8* 16 -30 +9

Then multiply

128 -30+9

Then add and subtract

107