I need help with math! ->

C) and D)

Step-by-step explanation:

C and D

Step-by-step explanation:

A) 8(x+2)

When using the distributive property, this equation equals 8x+16

B) 12x+4-8x+4

After adding all like terms, this equation equals 4x+8

C) 4(2x+1)

After using the distributive property, this equation equals 8x+4

D) 5x+2+3x+2

After combining all like terms, this equation equals 8x+4

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

13cm

step-by-step explanation:

(apex)