Question

A shop sells milk and bread. Milk costs a pence a bottle. Bread costs b pence a loaf. Sarah buys 3 bottles of milk and 2 loaves of bread. Write a formula in terms of a, b to calculate the cost C of her shopping.

A) C = 3a + 2b
B) C = 2a + 3b
C) C = 3b + 2a
D) C = 5ab

Answer 1

The formula to calculate the cost C of Sarah's shopping, given that milk costs a pence a bottle and bread costs b pence a loaf, is C = 3a + 2b.

Step-by-step explanation:

The formula to calculate the cost C of Sarah's shopping, given that milk costs a pence a bottle and bread costs b pence a loaf, is:

C = 3a + 2b

Using this formula, we can substitute the values for a and b with the given information. Since Sarah buys 3 bottles of milk and 2 loaves of bread, the formula would become:

C = 3(a) + 2(b) = 3a + 2b