annam25 annam25
  • 03-11-2020
  • Mathematics
contestada

20. A rectangle has an area of 45 cm². The length is one cm less than twice the width. Find the dimensions of
the rectangle.

Respuesta :

jonesjrroberte jonesjrroberte
  • 03-11-2020
Width = 5, length = 9

Area = length * width

length = (2 * width) - 1

sub equation for length

45 = (2w - 1) * w
45 = 2w^2 - w
2w^2 - w - 45 = 0
(2w - 9)(w - 5)
2w - 9 = 0
w = 9/2, l = 8 no

w -5 = 0
w = 5, l = 9 yes
Answer Link

Otras preguntas

what is the equation of a line in slope-intercept form with a slope of -3/4 and a y-intercept of -2
Is there DNA in our food? How do you know?
A mountain climber camped at an elevation of 18,492 feet. the following day the climber descended 2,516 feet to another campsite. Type a numerical expression
What numbers add up to -5 and multiply to get -90
tanisha ran 3/5 of a 26 mile race in 3.2 hours.if she ran at a constant rate,what was her speed in miles per hour?
What is the connection between 2.3 times 6.9 and 6.9 divided by 2.3.
can someone help me on this question! please! :)Evaluate the formula V= BH/3; B = 36 in.² and h = 11 in.
what are the effects of global warming
write the value of the dijit 5 in 657
What two numbers has a lcm of 50