firesoccer5200 firesoccer5200
  • 23-02-2018
  • Mathematics
contestada

Find the dimensions of a rectangle whose area is 221 cm2 and whose perimeter is 60 cm. (enter your answers as a comma-separated list.)

Respuesta :

realtreegirl313
realtreegirl313 realtreegirl313
  • 23-02-2018
60 = 2 ( length + width ) 

30 = length + width 

Let length be = x and width = y 

x+y = 30 

xy = 209 

4xy = 836 

( x+ y)^2 = 900 

( x+y)^2 - 4xy = 900-836 = 64 

( x-y)^2 = 64 

x- y = 8 

x+y = 30 

ADD 2x =38 

x = 19 

y = 11 

ANSWER 19cm X 11cm
Answer Link

Otras preguntas

Which amendment is," Freedom to hold meetings and to ask the government to hear complaints"?
If a square has an area of 81 square units how long is each side?
range of motion definition
what is bigger ?5/8 or 3/4
What two numbers add to equal -11 and multiply to equal 28?What two numbers add to equal -20 and multiply to equal 51?What two numbers add to equal -5 and multi
To call off,invalidate,void means what
Which three ordered pairs complete the table to give solutions of the equation y = x – 7?  A.(3, –10), (0, –7), and (3, 4)  B.(–3, –10), (0, –7), and (3, –4)  C
how did the Soviet Union's foreign policy goals contradict one another ?
Peter and Rosemary Grant a. spent more than 30 years studying Darwin’s tortoises. b. studied the migration of the camel. c. actually observed evolution by natur
6 people meet for a business lunch. Each person shakes hands once with each other person present. How many handshakes take place?