4. You are part of a construction company that is supposed to build houses. An architect has left plans to build houses on each island. Bridges connect the islands. Island A and Island B have a total of 18 houses. Island A and Island C have a total of 16 houses. Island B and Island C have a total of 20 houses. A total of 27 houses is to be built on the three islands. Determine how many houses are to be built on each island.

There will be 9 houses built on island A and B.

There will be 8 houses built on island A and C.

There will be 10 houses built on island B and C.

The three islands will each have 9 houses built.

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)