21
E (225-25n)
n=1
So its D.
Answer:
x = 35°
Step-by-step explanation:
Same side interior angles are supplementary, or they add up to 180°. So write an equation:

Solve for x. Subtract 145 from both sides:

The value of x is 35°.
:Done
The number that is its own opposite is zero. Zero is both a positive and a negative number at the same time.
The answer would be B) all the powers have the value of 1 because the exponent is zero
Answer
I can't tell what you're asking but here is all the things
Step-by-step explanation:
Total Numbers: 10
Mean (Average): 7.9
SD: 4.38305
Variance (SD): 19.21111
Population SD: 4.15812
Variance(Population SD): 17.29