Question 1041124
1
L=the length of the first rectangle
w=the width of the first rectangle
p=2L+2w
22=2L+2w
11-w=L

58=4w+6L
58=4w+6(11-w)
58=4w+66-6w
58-66=-2w
-8=-2w
w=4
L=7

2
x=the cost to buy one song
y=the cost to buy one album
5x+y=22.94
y=22.94-5x
3x+2y=31.95
3x+2(22.94-5x)=31.95
3x+45.88-10x=31.95
-7x=31.95-45.88
-7x=-13.93
x=1.99
y=22.94-5*1.99
y=12.99

3
x=the number of pencil's bought
y=the number of pens bought
x+y=13
2.99y+1.99x=30.87
2.99(13-x)+1.99x=30.87
38.87-2.99x+1.99x=30.87
-x=30.87-38.87
x=8
y=5

4
L=the length of the rectangle
w=the width of the rectangle
L=4+2w
p=2L+2w
20=2L+2w
20=2(4+2w)+2w
20=8+4w+2w
20-8=6w
12=6w
w=2
L=8