Sunflower1971 Sunflower1971
  • 07-11-2015
  • Mathematics
contestada

x squared plus y squared equals 80. My daughter has to work out what x and y are. I have worked it out by trial and error, but know there must be a method. Please help!

Respuesta :

Amberdiana Amberdiana
  • 07-11-2015


you Need to think of 2 square numbers that add up to make 80

answer:

64 + 16

this means that x  = 8 and y = 4

because of the square roots

or

y = 4

and

x = 8

Answer Link

Otras preguntas

what does B.O.D.M.A.S. or B.E.D.M.A.S. mean?
Complete these ordered pairs for the equation: y = 3x - 6 (0,__), (__,0), (1,__)
what is the inverse of y=4x-2
A gourment shop wants to mix coffe beans that cost $3.00 per pound with coffe beans that cost $4.25 per pound to create 25 pounds of a new blend that cost $3.50
What is the standard equation of this hyperbola?4x2 = 36 + 9y2
what does B.O.D.M.A.S. or B.E.D.M.A.S. mean?
name two salts used in black and white photography
x and y are two different numbers selected from the first fifty counting numbers from 1 to 50 inclusive. what is the largest value that (x+y) / (x-y) can have?
How do I solve 5+ 5\5 + 5x5-5
A planet has two moons.  The first moon has an orbital period of 1.262 Earth days and an orbital radius of 2.346 x 104 km.  The second moon has an orbital radiu