Recently, 1 us dollar was worth 0.51 english pound. if you exchanged 500 english pounds, how many dollars would you get?

$980.39

Step-by-step explanation:

The exchange can be written as a proportion:

... $1/0.51£ = x/500£

Multiply by 500£ to get ...

... $1 × 500/0.51 = x ≈ $980.39

You would get $980.39 in the exchange.

$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)