If 4a + 2b = 30, what is the least possible value for a + b?
A. 8
B. 9
C. 10
D. 11
E. 12
For the least possible value here for a + b, focus on a because it will be multiplied by 4. That gives you the chance to have a small value for b.
4a + 2b = 30
4(7) + 2(1) = 30
7 + 1 = 8