Marcus completed 187 jumping jacks in 3 days. he completed 60 jumping jacks on each of the first 2 days, and y number of jumping jacks on the third day. which equation can be used to find y, the number of jumping jacks marcus completed on the third day? a. y = 187 + (60 × 2) b. y = 187 − (60 × 2) c. y = 187 − (60 ÷ 2) d. y = 187 + (60 ÷ 2)