mirandaanthony35 mirandaanthony35
  • 15-01-2020
  • Mathematics
contestada

What is the length and width of a rectangle if Area is 20 and perimeter is 20

Respuesta :

Stefanisaska
Stefanisaska Stefanisaska
  • 15-01-2020

Answer: a=5+√5

b=5-√5

Step-by-step explanation:

a=?

b=?

P=20

A=20

P=a*b=20

A=a+b=20

------------------

ab=20

a+b=10

--------

a=10-b

(10-b)b=20

-b²+10b-20=0

b=-10±√100-80/-2

b=-10±√20/-2

b=-10±2√5/-2

b=-10-2√5/-2=5+√55

b=5-√5

a+b=10

a+5-√5=10

a=5+√5

a+5+√5=10

a=5-√5

Answer Link

Otras preguntas

Find the area of a square with sides if length 1/3 yard. A.1/3sq.yd B.1/4 sq.yd C.1/9sq.yd D.2/9sq.yd Please explain how too
Calcium nitrate and ammonium fluoride react to form calcium fluoride, dinitrogen monoxide, and water vapor. What mass of each substance is present after 21.59 g
how do you do this? please answer!
What is a physical property of snowflakes? A They are square B. They are a gas C. They have six points D. They are a liquid
HELP Im giving big brain! Can u tell me what these directions are telling me to do in simplier terms:What was Madam Walker’s approach to business? Support your
how would I say "Paras en la señal de parada" informal in Spanish
why were americans moving westward in the early 19th century
Aren't/Isn't Roslan in his room?​
A website sells Bolga baskets for $42 each. The expression 42b represents the total price buying b baskets. What do the parts of the park expression 42b repres
Extra points!!!!! List the general types of housing (Example: condo)