Which equation could be used to solve the question below?

justine went to the doughnut shop and bought d boxes of 24 doughnut holes. then, she took 37 doughnut holes to her morning meeting. now, she has 83 doughnut holes left. how many boxes of doughnut holes did justine buy in all?
a.
d - 24 × 37 = 83
b.
d × 24 - 37 = 83
c.
d × 24 + 37 = 83
d.
d + 24 × 37 = 83

Which speed is the fastest (use 1 mile ≈ 1.6 kilometers)? a. 12 miles/hour b. 18 feet/second c. 19 kilometers/hour d. cannot be determined

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers