Answer:
Move to the left of the horizontal number line to substract
You know
Squaring both sides gives
Then raising both sides to any integer power 
gives
That is, any power of 
where the power is a multiple of 4 will always be equal to 1.
So
But perhaps you mean to write 20+1 as the exponent, in which case
Answer:
x = 4
Step-by-step explanation:
We are to solve for;
-x = -4
A number (n) multiplied by x gives -4. What is the number?
n × x = -4
n is definitely equal to -1
So to get the value of x; we divide -4 by -1 to get 4
Therefore x = 4
It would be A, because her annual premium rate is $3.25 for every $1,000. So 3.25x130=$422.50
