IDNStudy.com, ang perpektong platform para sa eksaktong at maaasahang mga sagot. Hanapin ang impormasyon na kailangan mo nang mabilis at madali sa pamamagitan ng aming komprehensibo at eksaktong platform ng tanong at sagot.

Directions: Use a variable to represent the unknown quantity, and then write an equation from the given and information.

1. The area of a concrete rectangular pathway is 350m^2 and its perimeter pathway is 90 m. What is the length of the pathway?



Sagot :

Answer:

length=35

Step-by-step explanation:

Area of the rectangle: A=l*w

A=L*w

350=L*w

350/L=w

Perimeter of a rectangle: P=2L+2W

P=2L+2W

Substitute 350/L=W

P=2L+2W

90=2L+2(350/L)

90=2L+700/L

add 2L to 700/L

90=(2L²+700)/L

90L=2L²+700

transpose 90L to the right side leaving 0 on the left side

0=2L²-90L+700

Factor 2l²-90l+700

0=(L-10)(L-35)

L=10 ; L=35

Length is L=35 meter because length must be longer than the width.