Question

7: You buy 4 pounds of apples and two loaves of bread. Write a numerical expression for the total cost and solving.
8: You handicap here a $20 bill. How much change do you receive?
9: Bananas are on sale for 25% off. What is the new price per pound for bananas?

Answer 1

I don't know the item prices from your worksheet. I'll give the general expressions and then one worked example — tell me the actual prices and I can compute with those.

Let a = price per pound of apples, b = price per loaf of bread, and p = original price per pound of bananas.

7) Numerical expression for total cost of 4 lb apples and 2 loaves:
4a + 2b
(You evaluate it by substituting the prices for a and b.)

8) If you pay with a $20 bill, your change is:
20 − (4a + 2b)
(If this is negative, $20 is not enough.)

9) Bananas 25% off: new price per pound =
p − 0.25p = 0.75p

Example (if apples = $1.25/lb, bread = $2.50/loaf, bananas = $0.80/lb):
7) Total = 4(1.25) + 2(2.50) = 5.00 + 5.00 = $10.00
8) Change = 20 − 10.00 = $10.00
9) New banana price = 0.75(0.80) = $0.60 per lb

Tell me the actual prices and I’ll compute the exact answers.