Write an equation to help you find the value of each variable. Solve the equation.
a) 60% of C is 43.2 b) 38% of E is 190

C = 72

E = 500

Step-by-step explanation:

Is means equals  and of means multiply

a) 60% of C is 43.2

.60 *c = 43.2

Divide each side by .60

c = 43.2 / .6

C =72

b) 38% of E is 190

.38 *E = 190

Divide each side by .38

E = 190/.38

E =500

good luck on your studies! : )

david edward.

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb