audreyburkett12 audreyburkett12

15-02-2017
Mathematics

contestada

7. In which quadrant does the solution of the system fall?
x + y = 4
2x – y = 2

A.I
B.II
C.III
D.IV

Respuesta :

LaceyBunnyHop LaceyBunnyHop

16-02-2017

From X + Y = 4
Y = 4 - X
Substituite this for Y in 2X - Y = 2 to get
2X -(4 - X ) = 2
2X -4 +X = 2
3X = 6
X = 2
Now return to X + Y = 4
Knowing X = 2,
2 + Y = 4
Y = 4 - 2
Y = 2
The solution is (X,Y) = (2,2)
This is quadrant I
Answer is A

Answer Link

Otras preguntas

A shape that has four congruent sides but does not have any right angles

Which of the following are nutrients absorbed by the large intestine? Check all that apply. bacteria water saliva sodium vitamins

Tom displays very odd behavior. He wears a heavy parka and mittens during the summer and lectures from the steps of City Hall about upcoming invasions by men fr

reciprocal of 12 by 15 is

A competition between countries for better and more advanced weapons. Arms Race Warsaw Pact Truman Doctrine Marshall Plan

What is the difference between an inhabited and uninhabited territory? Inhabited territories have a permanent population, and uninhabited territories do not.

Upon what does the energy of a quantum depend? the amount of light emitted the duration of the radiated energy the element involved in generating the quantum th

Can y’all help me please!!

If 5.0 moles of CO 2 are produced, how many moles of O 2 reacted? NEED ANSWER PLEASE

There are 32 students in the cafeteria, 12 girls and 20 boys. What is the ratio of girls to boys in the cafeteria? A. 3:5 B. 3:2 C. 5:3