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.

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