Jim began a 211 mile bicycle trip to build up stamina for a triathlete competition unfortunately his bicycle chain broke so he finished up the trip walking the whole trip took seven hours of gym walks at the rate of 5 mph and rides 37 mph find out how much time he spent on the bicycle

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for

b

step-by-step explanation:

the answer is "add 2y and y"

step-by-step explanation:

you need to collect the like terms first.

step-by-step explanation:

i think its about 8