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angle c is 95. 95+55+30 is 180

Step-by-step explanation:

the triangle sum theorem says that the interior of a triangle is 180 degrees

90 degrees

Step-by-step explanation:

<C + 30 degrees + 55 degrees = 180

<C = 95 degrees

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10