X = 180 - 60 - 60
= 180 - 120
= 60 degrees Answer
Answer:
3rd Matrix
Step-by-step explanation:
When you start putting the coefficients in as the matrix, you see that -9 has to be the 1st number, so that eliminates choice B and choice D as answers. You are left with choices A and C. C is the correct choice because when you plug in the second equation, your coefficient is -5, not 0.
Answer:
79 degrees
Step-by-step explanation:
This is because <CBF is equivalent to <GFI
So, we know two angles in that triangle; 55 and 46.
By adding these together we get 101. In a triangle, the angles all add up to 180.
So we must subtract 101 from 180 and we will have that remaining angle.
is differentiable across its domain, so the MVT says there is some value of
in the open interval
such that
You have
so the equation above becomes
Solve for
.
so
is indeed the average of the endpoints, i.e. the midpoint.
