Question

PLEASE ANSWER I NEED HELP!!..

1. Solve.
x-2/5 = 1/5

a. 1/3
b. 1/2
c. 2
d. 3

2. What is the ratio of a to b.
1/2 = a+b/a-b

a. -3
b. -1/2
c. -1/3
d. 3

3. Samir paid $15.50 in shipping charges on a package that weighed 20 pounds. If shipping costs a certain set amount per pound, what shipping changes would Samir pay on a 50-pound package?

a. Samir will pay $6.20 in shipping costs.
b. Samir will pay $21.70 in shipping costs.
c. Samir will pay $38.75 in shipping costs.
d. Samir will pay $45.50 in shipping costs.

Answer 1

Please don't post masses of questions all at once. 1-2 problems per post would be more realistic and fairer to others who need help.

Regarding x-2/5 = 1/5

We are to solve for x. To do this, let's remove the fractions by mult. all 3 terms by 5. Then 5x - 2 = 1, or 5x = 3.

Dividing both sides by x, we get x = 3/5 (answer). Check this by subst. 3/5 into the original equation.