Yohanna is conditioning all summer to be fit for the next soccer season at his high school. He incorporated walking planks into his daily workout regime. Each day, he will complete 4 more walking planks than the day before. If he starts with 5 walking planks on the first day, how many walking planks will he do on the twelfth day?

Question

Mathematics

Beckett Henson

17 January, 08:34

Yohanna is conditioning all summer to be fit for the next soccer season at his high school. He incorporated walking planks into his daily workout regime. Each day, he will complete 4 more walking planks than the day before. If he starts with 5 walking planks on the first day, how many walking planks will he do on the twelfth day?

+2

Answers (2)

Know the Answer?

Wilkerson · Answer 1

4 more than previous day

so

aritmetic sequence

first term is a1

common difference is d

an=a1+d (n-1)

first term is 5 planks

increases by 4 each day

an=5+4 (n-1) is the equation for how many he will do on the nth day

12th day

a12=5+4 (12-1)

a12=5+4 (11)

a12=5+44

a12=49

49 walking planks

Salvatore Riggs · Answer 2

49 walking planks because 5+4+4+4+4+4+4+4+4+4+4+4=49