The surface area of a cube is 216in.² what is the volume of a cube

216 in^3

Step-by-step explanation:

Length=L

Surface area=216

surface area=6 x L^2

216=6xL^2

Divide both sides by 6

216/6=(6xL^2)/6

36=L^2

L^2=36

Take the square root of both sides

√(L^2)=√(36)

L=6

Volume of cube=L x L x L

volume of cube=6 x 6 x 6

Volume of cube=216

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225