Posted by Breanna on Tuesday, June 30, 2009 at 12:10am.
1. The area of a rectangle is 12 and the width is 3/4 the length. What are the dimensions?
2. One leg of a right triangle is 2 1/2 times the other and the area is 20. What are the dimensions?
Algebra - Marth, Tuesday, June 30, 2009 at 9:32am
let x = the length
let (3/4) x = the width
The area of a rectangle = width * height.
area = width*height
12 = x*(3/4)x
12 = (3/4)x^2
12/(3/4) = x^2
16 = x^2
x=4. The answer x=-4 does not make sense in the context of the problem.
let x = leg one
let 2.5x = leg two
The area of a triangle = base*height/2
area = base*height/2
20 = 2.5x*x/2
20 = 2.5x^2/2
20/2.5 = x^2/2
8 = x^2/2
16 = x^2
x=4. Again, the answer x=-4 does not make sense in the context of the problem.
Answer This Question
More Related Questions
- Algebra Homework, HELP! - 1) A rectangle has an area of 297 square inches and a...
- Algebra, URGENT!!! - 1) The first leg of a right triangle is 6 cm longer than ...
- Math - 1) The hypotenuse of an isosceles right triangle is 8 cm longer than ...
- Math-Algebra 1 - I have 2 questions. one is a rectangle that has an area of 34 ...
- math - a rectangle is twice as long as it is wide. if both of its dimensions are...
- algebra help please - The area of a rectangle of length x is given by 3x^2+5x ...
- math117 - The area of a rectangle of length x is given by 3x2 +5x. Find the ...
- Math - "One leg of a right triangle is 50.A line parallel to the other leg and ...
- mat117/algebra - The area of a rectangle of length x is given by 3x^2 + 5x. Find...
- algebra - sooo confusing... 6. (¼ + 7/8)(9/13) A81/13 B17/104 C81/104 D17/29 E17...