Question

On his first day working out, anthony did 30 push-ups. on each successive day, he did exactly 3 more push-ups than on the previous day. after completing his push-ups on the 30th day, how many push-ups had he completed on all 30 days?

Answer 1

The correct answer would be more than 2,000 (approximately 2,205) because on the first he did 30, the second was 33, third was 36, and so on. You would have to make a chart for this, which could be somewhat boring, or you could write it out and do 30+30+3+30+6+30+9, etc for 30 different days, with 30 being for each day and progressively adding 3. Hope this helped!

Answer 2

(a₁)=30; n=30; d=3; S₃₀=(n/2)*(2a₁+(n-1)*d)=15*(60+29*3)=2205