a) 104-64=40
40x (0.50-0.20)=$12
b) 40x2.7g=108g
1134g - 108g=1026g or 1.026kg
wch\" post_id=\"2040103\" time=\"1633073465\" user_id=\"6988:[/quote]May I know the steps?james_zyf\" post_id=\"2040094\" time=\"1633072939\" user_id=\"194962:a. $12, or 1200C
b. 1.026kg
[quote=Pinkfellow post_id=2040092 time=1633072706 user_id=137321]Helen and Ivan had the same number of coins. Helen had a number of 50-cent coins and 64 20-cent coins. These coins had a mass of 1.134 kg. Ivan had a number of 50-cent coins and 104 20-cent coins .
(a) Who has more money in coins and by how much?(2)
(b) given that each 50-cent coin is 2.7g more heavier than a 20-cent coin, what is the mass of Ivan’s coins in kilograms? (2)