kamyrenmontreal kamyrenmontreal
  • 13-01-2020
  • Mathematics
contestada

a rectangular garden is 20 ft longer than it is wide. its area is 800 ft^2. what are its dimensions?

Respuesta :

elenipope
elenipope elenipope
  • 13-01-2020
You need to set a variable to represent the width, let's say "w'.

width = w

length (l) = 20 + w


Area = length * width
A = (20 + w) * w


See how I substituted the length in terms of w, above? We also know the area, so plug that in:

A = (20 + w) * w
1500 = (20 + w) *w


Solve for w. If it's easier, rewrite as:

1500 = w(20 + w)


Distribute the right side, and solve for w (width).


Then plug back into the equation for length --> length = 20 + w to find the other dimension
Answer Link

Otras preguntas

How to study well for an exam ?
What are future effects on society and business using computers?
Why did the east German party cease to exist by the end of 1989?
What does |-100| equal?
Translate the word phrase into a math expression.  nine more than five times a number                                           A. 9 > 5n B.
Which regions have been the sites of genocide or a attempted genocide in the last 30 years?
Hydrangea plant's petals change to which colour on the addition of acids?
Using numbers 1 3 5 7 9 11 13 17 19 in 5 steps sum should be 30.We can repeat numbers.
What former president believed July 2 was the correct date to celebrate American independence?
Vivid writing includes ___ descriptions of things that can be seen, touched, heard, smelled, and tasted. A. sensuous B. tangent