Question

The perimeter of Dawna's new flat screen television is 70 inches. The ratio of its length to width is 4:3. Write and solve an algebraic equation to determine the dimensions of the television.

help

Answer 1

Length = L width = W
4+3 = 7
3/7 * 70 = 30
4/7 * 70 = 40
30 = 2W
40 = 2LW = 15
L = 20

Answer 2

perimiter=2(Length+width)
perimiter=70
70=2(L+W)
divide both sides by 2
35=L+W

L:W=4:3
4+3=7
35=L+W
35=7 units
divide both sides by 7
5=1 unit


length=4 units
4 times 5=20
width=3 units
3times 5=15

length=20in
width=15in