Answer:
C. 70
Step-by-step explanation:
x + (x + 40) = 180
2x + 40 = 180
2x = 140
x = 70
Answer:
X = 100
Step-by-step explanation:
X + 20 over 4 = 30
1/4x + 5 = 30
-5 -5
1/4x = 25
multiply both sides by 4
x = 100
Answer:
5.0625
Step-by-step explanation:
1. (2/3)^-4
2."store" the ^-4 for later use
3.calculate 2/3 or .66
4.use the ^-4 on .66