Posted by sheila on Tuesday, January 29, 2008 at 9:33pm.
i need help in solving these 2 problems...please help..thank you...
Your home is built on a square lot. To add more space to your yard, you purchase an additional 4 feet along the side of the property. The area of the lot is now 9600 square feet. What are the dimentions of the new lot??
The Garys have a triangular pennant of area 420in.^2 flying from the flagpole in their yard. The height of the triangle is 10 in. than 5 times the base of the triangle. What are the dimensions of the pennant??

math  Quidditch, Tuesday, January 29, 2008 at 10:42pm
For the first problem:
x=length of side before the addition
x+4=the length of the longer side after the the additional 4 feet is purchased.
The new area of the property is:
x(x+4)=9600
x^2 + 4x =9600
x^2 + 4x  9600=0
which is:
(x96)(x+100)=0
Ignore the negative solution for x since a negative number would not make much sense for a lot length.
x=96 and x+4=100

math  Damon, Tuesday, January 29, 2008 at 10:46pm
x * ( x + 4 ) = 9600
x^2 + 4 x  9600 = 0
solve quadratic
area = (1/2) b h
420 = (1/2) b (5b+10)
840 = 5 b^2 + 10 b
b^2 + 2 b  168 = 0
solve quadratic
Answer This Question
Related Questions
 Math  16.Eliot spent 24 minutes solving 8 math problems.At that rate, how many ...
 math  Ms. Jacobs is planning to put a fence around a rectangular part of her ...
 math  A scale model of a rectangular building lot measures 7 feet by 5 feet. If...
 Algebra  Square lot. Sam has a lot that he thought was a square, 200 feet by ...
 Calculus  A rectangular swimming pool is to be built with an area of 1800 ...
 Math  Can someone please check my answers? A yard has a square gate that has an...
 Algebra  Solving word problem using quadratic equation. The book says the ...
 ssis, math  your garden yard is 50ft wide and perimeter is 500 square.you have ...
 math  Welmin makes a square quilt that has an area of 100 square feet.It has ...
 Math please help with these word problems i have  1. The circumference of a ...
More Related Questions