A cabinet has shelves that are 11 1/2 in. Apart. On one shelf, brad stacked a cd player that is 5 1/4 in. High on top of an amplifier that is 4 1/8 in. High. How much space is left above the cd player?

Step-by-step explanation:

Given the total space in the shelf = 11 1/2 in

Total spaced used = 5 1/4 + 4 1/8

Total spaced used = 21/4 + 33/8

Total spaced used = 42+66/16

Total spaced used = 108/16

Total spaced used = 6 12/16

Total spaced used = 6 3/4 in

Amount of space left = 11 1/2 - 6 3/4

Amount of space left = 23/2 - 27/4

Amount of space left = (46-27)/4

Amount of space left = 19/4

Amount of space left = 4 3/4 in

Hence the amount of space left in the shelf is 4 3/4 inches

bull

step-by-step explanation:

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -