A)
y= total charges
x=number of mattresses
Company A: y=$30x+13 Company B: y=$28x+15
B)
plug x=4 into both equations to get
A: y=30(4)+13=$133
B: y=28(4)+15=$127
Company B charges less because 127<133
C)
Plug in 7 for x
A: y=30(7)+13=$223
B: y=28(7)+15=$211
A-B=223-211
=$12 Saved
The basic ratio of 12:27 is 4:9. You just divide both numbers by 3.
Do you divide 1/2 feet which would be 6 feet? Idk cause I'm only in 7th grade
