04-03-2016
Mathematics

contestada

X^2 + y^2=40 and y=x-4 solve this simultaneous equation

Respuesta :

Аноним Аноним

04-03-2016

Write x-4 instead of y.
x²+(x-4)²=40
x²+x²-8x+16=40
2x²-8x-24=0
x²-4x-12=0
(x-6)(x+2)=0
x=6 or x=-2

for x=6, y=6-4 = 2
for x=-2, y=-2-4 = -6

Answer Link

Otras preguntas

I need help with project

Which of the following was not a title taken by Augustus? O Pontifex maximus O Princeps O Augustus O Emperor O None of these

Rahi is pouring concrete to create the foundation of a square deck covering 112 square feet. Which is the best estimate of one side of the deck? Round to the ne

What is the largest known number called?

1+0.9+0.08+0.001 Somebody can help me please

Plants store _____ energy in their tissues. A mechanical B heat C light D chemical

In 1860 the small towns became a city. true or false

The measure of an angle is 34.6°. What is the measure of its complementary angle?

change -23/20 into a deciamal

A bag contains the following marbles: 8 black marbles, 12 blue marbles, 18 brown marbles, and 6 green marbles. What is the ratio of brown marbles to blue marble