Question

Mary buys x apples and some oranges. She buys two more oranges than apple.

Write down, in terms of x, an expression for the number of oranges that she buys.
Each apple costs 30 and each orange costs 40¢. Find as simplify as possible in terms of x, an expres-
sion for the total cost of the fruits that Mary buys.

Answer 1

x+2

0.70x + 0.80

Explanation:

x=number of apples

x+2=number of oranges ==> the number of oranges is 2 more than the

number of apples

1¢=1/100 dollars

30*1¢=30*1/100

30¢=30/100

30¢=0.30 ==> cost per apple

40¢=0.40 ==> cost per orange

0.30x + 0.40(x+2)=

0.30x + 0.40x + 0.40*2= ==> distribute 0.40 to x and 2

0.70x + 0.80 ==> simplify