It takes a total of 78 hours to build four bed frames, a bookcase, and three chairs. It takes 108 hours to build six bed frames and four chairs. It takes 74 hours to build three bed frames, five bookcases, and two chairs.

9514 1404 393

Step-by-step explanation:

Perhaps you want to know how many hours it takes to build each item.

If we let f, b, c represent the number of hours for a frame, bookcase, and chair, respectively, the equations can be written as ...

Your graphing calculator or an on-line matrix solver can find the reduced row-echelon form of the augmented matrix ...

That result will tell you ...

  (f, b, c) = (14, 4, 6)

It takes 14 hours to build a bed frame, 4 hours to build a bookcase, and 6 hours to build a chair.

d

step-by-step explanation:

d) 48

step-by-step explanation:

16,32,48,64,80,96,112,128,144,160,176,192,208,224,240,256,272,288,304,320,336