The answer is x=90, y=43. For any and all triangles, their angles must add up to 189 degrees. Since we know that C's degree is 47, we just have to then look at our choices and see which would equal 180. Also x is clearly a 90 degree angle because it is a right angle. That's one way to narrow down the choices quick.
Answer:
4 hours
Step-by-step explanation:
20-5x=0
5x= 20
x=4 hours
Answer:
The true statement is that the expression is satisfied for n = -2.
Step-by-step explanation:
Given:

To check:
Left hand side = Right-hand side ( for n = -2)
Proof :
For n = -2
Consider Left hand side of the equation given above.
∴ Left hand side = 4n
= 4×(-2) ......................for n = -2
= -8
Consider Right-hand side of the equation given above
∴ Right-hand side = 

Now we get Left hand side equal to Right hand side
i.e. Left hand side = Right hand side
i.e.
is true for n = -2