Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
The length of a rectangle is 7 inches more than the width. The perimeter is 42 inches. Find the length and width
 one year ago
 one year ago
The length of a rectangle is 7 inches more than the width. The perimeter is 42 inches. Find the length and width
 one year ago
 one year ago

This Question is Closed

dpflanBest ResponseYou've already chosen the best response.1
Cool, so for that rectangle, perimeter is 42. How do you find the perimeter?
 one year ago

dpflanBest ResponseYou've already chosen the best response.1
Do you know the formula for finding the perimeter of an object?
 one year ago

dpflanBest ResponseYou've already chosen the best response.1
yeah, in this case for the rectangle, P = 2*length + 2*width. So you have values for the length and the width, right? L = x + 7 W = x
 one year ago

dpflanBest ResponseYou've already chosen the best response.1
Plug those values into the perimeter function, what does the equation look like after doing that?
 one year ago

kimye21Best ResponseYou've already chosen the best response.0
my equation looks like this 42=2(7)+2w 4214=28 which makes w = 14 then for L 14+7=21 am i right
 one year ago

dpflanBest ResponseYou've already chosen the best response.1
Getting there, so the values you have for each dimension are actually variables  (x+7), and x Therefore P = 2*L + 2*W becomes L = x + 7 W = x P = 2*(x+7) + 2*(x) 42 = 2*(x+7) + 2*(x)
 one year ago

dpflanBest ResponseYou've already chosen the best response.1
Because there is only one variable, one unknown, that being 'x', we can easily then solve for it from the adjusted equation.
 one year ago

dpflanBest ResponseYou've already chosen the best response.1
Does that make sense? Give that equation a shot, and solve for x.
 one year ago

dpflanBest ResponseYou've already chosen the best response.1
Definitely! that's it, so L = ? and W = ?
 one year ago

dpflanBest ResponseYou've already chosen the best response.1
Just have to do that last step and you're donw
 one year ago

dpflanBest ResponseYou've already chosen the best response.1
Quite easy after finding x...
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.