Need with number 3 and 4. worth 77

Let X = cost per pound and Y be the base price.

Total cost would equal base price plus weight cost = T = Y +X

For the 3 pound package the price would be the base price plus 3 times the price per pound: y + 3x

Now you have 22.85 = y +3x

For the 10 pound package you have 40 = Y + 10x

Rewrite the second equation as y = 40-10x

Replace Y in the first equation:

22.85 = 40-10x + 3x

Simplify:

22.85 = 40 - 7x

Subtract 40 from both sides:

-17.15 = -7x

Divide both sides by -7:

x = -17.15 / -7

x = 2.45

The cost per pound is $2.45

Now you can find base price:

22.85 = Y +3(2.45)

22.85 = y + 7.35

y = 22.85 - 7.35

y = $15.50

Answer for #3:

Total cost = 15.50 + 2.45X ( X = the weight of the package).

Answer for #4

Total = 15.50 + 2.45(15)

Total = 15.50 + 36.75

Total = $52.25

yes

step-by-step explanation: