Question

1. Evaluatebc+5awhena=3,b=4,andc=­6

Answer 1

a = 3
b = 4
c = 6

bc + 5a

4(6) + 5(3)

24 + 15 = 39.

Answer 2

≡ We know that:
⇔ $a=3$
⇔ $b=4$
⇔ $c=6$

≡ Solution:
⇒ $bc+5a=(4).(6)+(5).(3)$
⇒ $24+15=\boxed{39}$