Darnell and Stephanie have competing refreshment stand businesses. Darnell's profit can be modeled with the polynomial 7c2 + 120 -250, where is the number of items sold. Stephanie's profit can be modeled with the polynomial 4c2 - 9c - 178. Show your work.

a. Write a polynomial that represents the difference between Darnell's profit and Stephanie's profit.

b. Write a polynomial to show how much they can expect to earn if they decided to combine their businesses.

, 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 mark me branliest thx

step-by-step explanation:

c > -10.55

step-by-step explanation:

your answer is -9

step-by-step explanation: