Linear equations (three variables)

Linear equations (three variables)

9th - 12th Grade

20 Qs

quiz-placeholder

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Linear equations (three variables)

Linear equations (three variables)

Assessment

Quiz

Mathematics

9th - 12th Grade

Hard

Created by

Quizizz Content

FREE Resource

20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Media Image

A student in solving the following system of equations using the elimination method. Explain what their first step would be if they wanted to eliminate the y variable from equations (i) and (ii).

They would multiply equation (i) by 3 and equation (ii) by 4.

They would multiply equation (iiI) by 4.

They would multiply equation (i) by -3 and multiply equation (ii) by 4

They would multiply equation (i) by 3

2.

FILL IN THE BLANK QUESTION

30 sec • 1 pt


Solve the following System --your answer should be in the form: (x,y,z) NO SPACES unless "no solution" or "infinitely many solutions" typed how you see it without quotations.

 3xy=113x-y=11  

 2y+z=172y+z=17  
 x+4z=41x+4z=41  

3.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Media Image

Solve the System.

( -2, 3, -3)

None of these

( -2, -3, 3)

( -3, 3, -2)

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

For the system of equations:
A:   3x - 2y + 4z =  9
B:   -2x + y - 2z = -8
C:   6x - 4y + 5z = 22
A good option for solving this would be:
take 2 times A + B to get equation D,
 then take 4 times B + C to get equation E.
Take  A + 2 times B to get D, then
take 2 times A + C to get E.
take 2 times B + A to get D, then
take -2 times A + C to get E.
Add A + B + C to get the answer.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

x

y

z

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

x+y+z=12

3x+y=19

5x=25

What would you solve for First?

Solve for x

Solve for y

Solve for z

(5,3,4)

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many variables are we using if the solution set is

 (x, y, z)\left(x,\ y,\ z\right)  

1

0

3

2

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