Both angles WILL have the same measure.
So,
3x-10= x+40 (you have to set the equations equal to one another)
Now, add 10 to both sides.
3x=x+50
Subtract x on both sides.
2x=50
Divide both sides by 2.
x=25
Now, plug in x.
(25 +40)= 65
(3(25)-10)= 65
x equals 25 and both angles are equal to 65. Or "B".
I hope this helps!
~cupcake
Answer:

Step-by-step explanation:
A square of a monomial is
that is 
Use properties of exponents:

Note that

Then

So, the monomial is

10x6x9? Or simplify this question for me I'll figure out.
Answer:
-42
Step-by-step explanation:
denominator is multiplied by -7, so do the same in numerator
Answer:
I thought It was 40%
Step-by-step explanation:
not 100 percent sure on it tho'-'