By what number must row 2 in the matrix 1 1 1 | 6
2 0 2 | -14
1 1 0 | 3

be multiplied for the matrix to change to

1 1 1 | 6
1 0 1 | -7
1 1 0 | 3

$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)

actually what is a question i don't understand