Which of the following shows that polynomials are closed under addition when two polynomials 4x2 − 8x − 7 and −5x + 16 are added?
4x2 − 13x + 9 may or may not be a polynomial
4x2 + 13x − 23 may or may not be a polynomial
4x2 − 13x + 9 will be a polynomial
4x2 + 13x − 23 will be a polynomial

the answer is C.

4x2-13x+9 will be a polynomial

Step-by-step explanation:

it was right on my test hope this helps by

answer: given that the roller coaster can accommodate 1600 riders per hour, thus the roller coaster can accomodate 1600 / 60 = 26.67 riders per minute.

given that there are 345 people in the line, the number of minutes it will take for the 345 persons to get into the roller coaster is given by 345 / 26.67 = 12.94 minutes.

therefore, it will take you 12.94 minutes to get to the front of the line.

step-by-step explanation:

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step-by-step explanation: