SOLUTION: the area of a rectangular picture is 160 cm ( squared)and the width is 4 cm less than the length, find this width in cm, correct significant figures

Question 1074366: the area of a rectangular picture is 160 cm ( squared)and the width is 4 cm less than the length, find this width in cm, correct significant figures
Found 2 solutions by ikleyn, MathTherapy:
Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
.

x*(x+4) = 160, x^2 + 4x - 160 = 0, x = = . The only meaningful positive root is = 10.806 (approximately).

Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!
the area of a rectangular picture is 160 cm ( squared)and the width is 4 cm less than the length, find this width in cm, correct significant figures

Width:
Round off to the number of significant figures needed!!
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