Answer:eu sunt ndrei ma 12 @ni sis din vaslui
Step-by-step explanation:salut ba
(2^3)^-5 = 2^(3 x -5) = 2^-15 = 1/2^15
For this case, the first thing we must do is define variables.
We have then:
x: number of years of Joan y: number of years of ellen We now write the system of equations:

Solving the system we have:

So that Joan is 21 years old then:
Answer: joan will be 21 years old in 12 years
I think it 42 u subtract all the numbers from 360
Answer:
C. 65º
Step-by-step explanation:
180º- (62+53)=65º
a=65º
180º-(65+62)=53º
b=53º
180º-(53+62)=65º
c=65º