Which expression is the completely factored form of x6−64y3? A.(x2−4y)3

B.(x2−4y)(x4+4x2y+16y2)

C.(x2+4y)(x4−4x2y+16y2)

D.(x2−4y)(x4−16y2)

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation:

493 would be the correct answer

step-by-step explanation:

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis: