Homework Help: algebra,help

Posted by jas20 on Sunday, March 25, 2007 at 7:09pm.

I need help with these problems can someone show me how to solve them step by step.If anyone has time i appreciate it.

Problem #1
Geometry. The length of a rectangle is 1 cm longer than its width. If the diagonal of the rectangle is 4 cm, what are the dimensions (the length and the width) of the rectangle?

Problem#2
Science and medicine. The equation
h=-16t^2+112t gives the height of an arrow, shot upward from the ground with an initial velocity of 112 ft/s, where t is the time after the arrow leaves the ground. Find the time it takes for the arrow to
reach a height of 180 ft.

first:

l-1=w

diagonal^2=length^2 + width^2
16=l^2 + (l+1)^2
solve for l

On the second, put 180 onto the equation , getting
16t^2 +112t - 180=0

or use the quadratic equation
I would divide by four to simplify it.

No one has answered this question yet.

Answer this Question

Related Questions

Pre-Algebra - Can someone show me how to solve this problem step by step?Here is...
Algebra - Can someone please help me with math problem and explain to me step by...
Pre-Algebra [urgent!] - I can't find the solution to this problem; can ...
math - how do you solve the exponential equation, 12^x = 14^3x? If someone could...
Algebra 1 - f(x)=x^2+3 Solve for f(2)and f(-5) I need help, can someone please ...
Algebra 1 - f(x)=x^2+3 Solve for f(2)and f(-5) I need help, can someone please ...
Algebra 2 - I need help trying to solve trigonometric identity problems I just ...
algebra - Can someone please show me how to solve this problem step by step ...
Physics - Can someone please show me step by step how to normalize e^-5x in the ...
Math - Can someone show me step by step on how to factor/solve this problem ...

For Further Reading

First Name:
School Subject:
Answer: