Question

Kolton is working through a setup for his new video that he wants to shoot and send to his friends. He's obsessed with trains and has so many of the "mini" trains that he thought it would be fun to set the trains up as if they were in seats at a stadium watching the big trains. (think theater seating) He knows that he wants to set it up so that there are 5 more trains in the next row for each of the next rows that he sets up and that the very first row in the front can only have 12 trains to start. Kolton asked me to help him come up with an equation to figure out how many mini trains he would need in each of the rows. Tell me what this equation would be describing the individual parts and then show all steps from start to finish for using that equation to solve for how many trains will be in row 15.

SHOW ALL MATH WORK AND EXPLANATIONS FOR THIS FROM START TO FINISH! IT'S A 10 POINT PROBLEM!

Answer 1

The equation that describes the number of mini trains Kolton would need in each row would be:

n = 12 + 5(r - 1)

where n is the number of mini trains in a given row, and r is the number of the row.

To find the number of mini trains in row 15, we simply substitute r = 15 into the equation and solve for n:

n = 12 + 5(15 - 1)

n = 12 + 5(14)

n = 12 + 70

n = 82

Therefore, Kolton would need 82 mini trains in the 15th row.