SOLUTION: Hi, i need help on my homework. They are word problems. 1. the length of a rectangle is 3 times the width. The perimeter is 40. What is the length and the width of the rectangle?

Question 945278: Hi, i need help on my homework. They are word problems.
1. the length of a rectangle is 3 times the width. The perimeter is 40. What is the length and the width of the rectangle?
2. the population of a gardens high school is 2500. If the number of males is 240 more than the number of females, how many males and females are there?
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

1.
if the length of a rectangle is times the width , we have

if the perimeter is => ...substitute from above

go to , substitute for

so, the length is and the width is

2.
the population of a gardens high school is ,
If the number of males is more than the number of females, how many males and females are there?
let the number of males be and the number of females
we know that ...eq.1
we also know that ....eq.2 ...substitute it in eq.1
...eq.1...solve for

->the number of females
now find

->the number of males

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