The byrds. you have 16 new cds to put on your empty five-shelf cd rack. can you place the cds so that each shelf contains three or fewer cds? can you arrange them so that each shelf contains exactly three?

Step-by-step explanation:

In this question we have given

Total number of CDs to put on empty shelf CD rack=16

Number or shelf in a CD rack=5

part 1:

Can you place the CDs so that each shelf contains three or fewer CDs

No we cannot place the CDs in such a manner that each shelf contains three or fewer CDs because there are 16 CDs which we have to keep in 5 shelf so each shelf will contains at least 3 CDs and one shelf will contains 4 CDs(Because=). If we place 3 or less CDs in each shelf than 15 or less than 15 CDs can be kept in all the 5 shelf

Part 2

Can you arrange them so that each shelf contains exactly three?

Answer :

No We cannot arrange them so that each shelf contains exactly three if we do so than 1 CD will be remain outside the shelf as

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18