-3 -6 we keep 3
we change subtraction to
opposite of 6 is

new expression is:
now recall the adding integers song and solve
difference:

-9

Step-by-step explanation:

First rewrite the equation as:

-3 + (-6) <- (we can do that because of additive inverse)

Then just add -3 and -6 to get -9

$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)