Answer:
18.9
Step-by-step explanation:
First, lets solve for the fractions. You can divide the fractions from the top, to their bottom (4 divided by 5, 3 divided by 5), in this case, you get 1.4. Now you have to rewrite the problem: 1.4+3.5x5. You solve it, and get 18.9.
Bse is 10
x^m, x is base of exponent
The third one, not sure about any other ones.
2(x-1)=42
2x-2=42
2x=44
X=22
