1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mash [69]
3 years ago
9

Solve the system using the elimination method.

Mathematics
1 answer:
Artemon [7]3 years ago
5 0
Multiplying the first equation by -1 and adding it to the third, we get 2y-8z=15 and by multiplying the first equation by -1 and adding it to the second equation, we get -3y-4z=3

Using the two equations, we have 
2y-8z=15
-3y-4z=3

Multiplying the second equation by -2 and adding it to the third, we have 8y=9 and y = 9/8 by dividing both sides by 8. Plugging it back into
-3y-4z=3, we have -27/8-4z=3 and by adding 27/8 to both sides, we have -4z=51/8 and by dividing both sides by -4 we get z=-51/32.

Plugging it into 2x − y + z =2, we get 2x-9/8+5(-51/32)=2, we get x=151/64 by adding -(5(-51/32)) to both sides as well as adding 9/8 to both.
You might be interested in
Please answer correctly !!!!!!!!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!!!
Shkiper50 [21]
X° = 180° - 160°
= 20°
x = 20
7 0
3 years ago
What is $5.60 for 4 pounds as a unit rate.
Sphinxa [80]

so you can either do pounds per dollar or dollars per pound:

pounds per dollar : about 0.71 lbs / $

dollars per pound : $1.40 / lb

i hope this helped, based on the question i believe that it is dollars per pound but its good to know both and have a nice day


5 0
3 years ago
Does anyone know the answer to this
iVinArrow [24]
The answer is A hehe

4 0
3 years ago
A soccer team has 11 players on the field. Of those players, 2 are forwards, 4 are midfielders, 4 are defenders, and 1 is a goal
Murrr4er [49]

Answer:

4/11

Step-by-step explanation:

There are 4 midfielders on the team out of 11.

3 0
3 years ago
a father is 10 times as old as his son. in 5 years he will be 5 times as old as his son. how old is the father and the son now
inn [45]

Answer:

The father is 40 and the son is 4.

Step-by-step explanation:

40 + 5 = 45.

4 +5=9.

45 divided by 5 = 9

5 0
4 years ago
Other questions:
  • Kenya plans to make a down payment plus monthly payment in order to buy a motorcycle. At one dealer she would pay $2,500 down an
    13·2 answers
  • What is the relationship between the changes in the radii and the volume?
    8·1 answer
  • Please help me with this question
    7·2 answers
  • 1. A bag contains 3 red marbles and 4 blue marbles. Two marbles are drawn at random without replacement.
    12·2 answers
  • Which answer is an equation in point-slope form for the given point and slope?
    7·2 answers
  • What is the awnser to that question
    12·1 answer
  • b) The average age of Bishwant. Pujan. Tanus and Salon is 11 years. If the of the first three children are 10 years, 14 years an
    14·1 answer
  • Which expression is equivalent to StartFraction RootIndex 7 StartRoot x squared EndRoot Over RootIndex 5 StartRoot y cubed EndRo
    6·1 answer
  • Two supplementry angles are in the ratio of 5:7 . find the measure of the angles
    13·2 answers
  • Solve sin x = cos x on the closed interval [pi, 3pi/2].​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!