SOLUTION: I need some help with the following: a) Evaluate 18 - 7 ÷ (1/5 + 1/2) b) (0.56 - 0.37) x 3 c) Evaluate 4 x 11 - 52 d) (42 - 6) ÷ 2

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I need some help with the following: a) Evaluate 18 - 7 ÷ (1/5 + 1/2) b) (0.56 - 0.37) x 3 c) Evaluate 4 x 11 - 52 d) (42 - 6) ÷ 2       Log On


   

Question 328017: I need some help with the following:
a) Evaluate 18 - 7 ÷ (1/5 + 1/2)
b) (0.56 - 0.37) x 3
c) Evaluate 4 x 11 - 52
d) (42 - 6) ÷ 2
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
You need to apply the "order of operations" (PEMDAS):
.
a) Evaluate 18 - 7 ÷ (1/5 + 1/2)
.
18 - 7 ÷ (1/5 + 1/2)
18 - 7 ÷ (2/10 + 5/10)
18 - 7 ÷ (7/10)
18 - 7 * (10/7)
18 - 10
8
.
b) (0.56 - 0.37) x 3
.
(0.56 - 0.37) x 3
0.19 x 3
0.57
.
c) Evaluate 4 x 11 - 52
.
4 x 11 - 52
44 - 52
-8
.
d) (42 - 6) ÷ 2
.
(42 - 6) ÷ 2
36 ÷ 2
18