The answer to this question is 2x^3
The second one, 7 < x < 13
We can solve this problem by using the laws of exponents. The laws of exponents state:

=

We can use this law in our situation. The answer here, using the laws of exponents, is

or
5.
Step-by-step explanation:
let,the sum of the ages of chukwu & Caroline be X & Y.
now,
X+y=45
X-y=3
(+) (+) (-)
__________
2x=42
or,X=42/2
or,X=21
putting the value of X,
X+y=45
or, 21+y=45
or,y=45-21
or,y=24
therefore,X=21
y=24