queenzoe20 queenzoe20

03-11-2017
Mathematics

contestada

Solve the system of equations 3y + 2z = 12 and y – z = 9

Respuesta :

Аноним Аноним

03-11-2017

mulitply second equation by 2 and add to first

3y+2z=12
2y-2z=18 +
5y+0z=30

5y=30
divide 5
y=6

sub back
y-z=9
6-z=9
minus 6
-z=3
times -1
z=--3

x=-3
y=6

Answer Link

Otras preguntas

Which loan type requires you to make loan payments while you’re attending school? Unsubsidized federal loanBSubsidized federal loanCPell GrantDNone of the above

The fabric of American empire ought to rest on the solid basis of the consent of the people. The streams of national power ought to flow from that pure, origina

FIRST ONE TO TELL ME THE ANSWER GETS BRAINIEST IT IS A MATH WORD 13. (16 letters). A word or phrase.

Mari and Rob are making a poster for the science fair . They need to figure out how much a rock that weighs 7 pounds on earth would weigh on Mars .they know tha

Mr. Stanton bought 121 feet of rope to repair a rope bridge. The ratio of the two pieces that he needs from the length he bought is 4 to 7. If he uses the entir

What is better organic food or non organic food?

What is the average rate of change of the function f(x)=5(2)^x from x = 1 to x = 5?

Which of the following has a slope of -3 and a y intercept of -5 1. y = –3x + 5 2. y = –3x – 5 3.y = 3x + 5 4.y = 3x – 5

what stages of plot will you play around with so you can tell your story in the most effective way possible?

State two applications of plane mirrors