A student takes a mathematics test scores of 52 and 64. What score on a third test will give the student an average of 60?\

64

Step-by-step explanation:

To score an average of 60 in the three tests, the total score of the test should be: = 60 × 3 = 180

Since the student already has scores of 52 and 64, the score in the third test will be:

= 180 - (52 + 64)

= 180 - 116

= 64

$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)