4x + 13y = 40
4x + 3y = -40
multiply second equation by -1
4x + 13y = 40
-4x - 3y = 40
add equations together
10y = 80
y = 8
put y in either original equation
4x + 3(8) = -40
4x + 24 = -40
subtract 24 from both sides
4x = 64
x=16
y=8
3.987 rounded to the nearest tenth = 4.0
Answer:
I believe the answer is the second one. Hope this helps :))
Answer:
see below
Step-by-step explanation:
No simplification is possible as there aren't any factors that can be combined or cancelled. The exponents can be made positive by moving the variable to the other side of the fraction bar.
The applicable rule of exponents is ...
a^-b = 1/a^b