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algebra home work plz help me!!!!!

1.) -(3d-2x)


2.)-3ab/5b


3.)〖(3/8)〗^3


4.) 2[5^2÷(3^2-2^2)+7]


5.) What is the value of x/y when x=9/4 and y=3/5?


6.) You are shipping a care package to your sister in college. It costs $0.85 per pound plus a flat-fee of $12 to ship the package. Write and use an algebraic expression to find the total cost of shipping a 7 pound care package.

Respuesta :

choixongdong
1.) -(3d-2x)
= 2x - 3d

2.)-3ab/5b
= -3a/5

3.)〖(3/8)〗^3
= 3^3 / 8^3
= 27/512

4.) 2[5^2÷(3^2-2^2)+7]
=  2[25÷(9-4)+7]
=  2[25÷(5)+7]
= 2[5+7]
= 2(12)
= 24

5.) What is the value of x/y when x=9/4 and y=3/5?

9/4  /   3/5
= 9/4 x 5/3
= 15/4
= 3 3/4 or = 3.75

6)
algebraic expression : 
p = # of pounds

0.85p + 12

if p = 7 lbs the
0.85 (7) + 12
= 5.95 + 12
= 17.95

answer
total cost = $17.95

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