Question

Please help easy math

Oliver needed to build 10 chairs to go with a dining room table that he had built. At the start of the second day he had completed 4 chairs, and by the end of second day of work, he had worked for 9 hours and completed 7 chairs in total.

How many more hours must he work before he will finish all 10 chairs?

A)
3


B)
9


C)
10


D)
18




Oliver needed to build 10 chairs to go with a dining room table that he had built. At the end of one day of work, he drew a graph to keep track of his progress and estimate when he would finish. The graph he drew is shown where the x-axis represents the amount of hours he has worked and the y-axis is the number of chairs he has built.

How many more hours must he work before he will finish all 10 chairs?

A)
3


B)
9

C)
10


D)
18

Answer 1

B) 9 Hours

Explanation:

He had already completed 4 chairs, and worked for 9 hours to complete three more, bringing him to 7 chairs. 9/3 = 3, therefore it takes 3 hours per chair. He needs three more chairs, so 3x3=9, therefore 9 hours are left to finish the last three chairs.