Answer
Actual values:
a) 38.3
b) 50.3
c) 143.7
d) -83.4
e) 155.6
f) 47.4
Work Step by Step
To simplify, we approximate using the closest perfect square to each number:
a) $3(3) - 4(5) + 6(8) = 37$
b) $ 9(5) + 5(6) - 3(9) = 48$
c) $ 12(2) + 13(4) + 9(7) = 129$
d) $ 3(10) - 4(9) -7(11) = -83$
e) $4(13) + 2(14) +5(15) =155$
f) $-3(16) -6(17) + 11(18) = 44$
