Answer:
Step-by-step explanation:
2x = 128
x = 128/2
x = 64
Answer:

Step-by-step explanation:
According to the Product Rule for Exponents, 
a = 7
m = 9
n = 4
So,

So, the answer is
.
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Step-by-step explanation:
2x + x+4+x = 180
4x = 176
x = 44
A 88
B 48
C 44
Answer:
83
Step-by-step explanation:
f(x) = 7x - 1
Put x as 12.
f(12) = 7(12) - 1
f(12) = 84 - 1
f(12) = 83