I need help with number 5

A

Step-by-step explanation:

62 +65=127

C+127=180

C=180-127=53°

so x=53°

53-y=11

y=53-11=42

A

Step-by-step explanation:

Since ΔCDE and ΔGHI are congruent triangles, they are equal to each other. This means x-y=11. We want to find y, but we first need to find x. We can do that by finding x° on ΔGHI.

We know that the sum of the angles is 180° in a triangle. We are given 2 angles from ΔCDE. We can use those to find x°.

62+65+x=180             [combine like terms]

127+x=180                   [subtract 127 on both sides]

x=53

Now that we have x, we can find y by plugging in.

53-y=11                         [subtract both sides by 53]

-y=-42                           [divide both sides by -1]

y=42

f(x) = 0

Step-by-step explanation:

f(x) = 5³ - 4(5)² - 7(5) + 10

f(x) = 125 - 4(25) - 35 + 10

f(x) = 125 -100 - 35 + 10

f(x) =25 -35 + 10

f(x) =  -10 + 10

f(x) = 0