Question

13. Mrs. Perry has a sum of money to buy fruits. She can buy n mangoes at $1.60 each and have $0.80 left. Alternatively, she can buy (n + 10) apples at $0.70 each and have $0.10 left.

(a) Find the value of n.
(b) How much money does Mrs. Perry have for buying fruits?
(c) If Mrs. Perry buys 3 mangoes and uses the rest of the money to buy apples,
(i) how many apples can she buy?
(ii) how much money will she have left?​

Answer 1

A) 7

Explanation:

1.6n + 0.8 = 0.7(n + 10) 0.1

1.6n - 0.7n = 7.1 - 0.8

0.9n = 6.3

n = 7

Answer 2

A) 7 B) $12 c) 17 apples

Explanation:

1.6n + 0.8 = 0.7(n + 10) 0.1

1.6n - 0.7n = 7.1 - 0.8

0.9n = 6.3

n = 7