Linear Equations in Two Variables Test

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Linear Equations in Two Variables Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is a linear expression in one variable?

A
x + 2

B
x + y + 3

C
x² + x + 2

D
y² + x + 3

Solution

Linear expression in one variable means that there should be only one variable in the expression and its degree should be one.
Question 2
1 / -0

By comparing the linear equation 2y + x + 4 = 0 with ax + by + c = 0, find the value of – b.

A
2

B
– 2

C
4

D
– 4

Solution

Writing the given equation in the standard form, we get x + 2y + 4 = 0 and comparing it with the standard equation ax + by + c = 0, we get
b = 2
– b = – 2
Question 3
1 / -0

Which of the following options is the standard form of the linear equation 7 – 2x + 3y = 0?

A
7 + 3y - 2x = 0

B
- 2x + 3y + 7 = 0

C
2x - 3y - 7 = 0

D
- 7 + 2x - 3y = 0

Solution

Writing the given linear equation in the standard form ax + by + c = 0, we get 2x - 3y - 7 = 0.
Question 4
1 / -0

By comparing the linear equation – 3y + 2x – 9 = 0 with ax + by + c = 0, find the value of (– c).

A
9

B
– 9

C
3

D
– 3

Solution

The given equation is – 3y + 2x – 9 = 0.
Writing the above equation in the standard form, we get
2x – 3y – 9 = 0

Comparing with the standard equation ax + by + c = 0, we get
c = – 9

∴ – c = – (– 9) = 9
Question 5
1 / -0

Which of the following expressions is a linear expression in two variables?

A
x² + 3

B
3x + 5y + 8

C
y² - x² + 8

D
y² + 9x + 18

Solution

Linear expression in two variables is an expression with two variables and its degree is one.

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Re-Attempt Weekly Quiz Competition

Linear Equations in Two Variables Test - 4

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Linear Equations in Two Variables Test - 4

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SHARING IS CARING

Question 1

x + 2

x + y + 3

x2 + x + 2

y2 + x + 3

Solution

Question 2

2

– 2

4

– 4

Solution

Question 3

7 + 3y - 2x = 0

- 2x + 3y + 7 = 0

2x - 3y - 7 = 0

- 7 + 2x - 3y = 0

Solution

Question 4

9

– 9

3

– 3

Solution

Question 5

x2 + 3

3x + 5y + 8

y2 - x2 + 8

y2 + 9x + 18

Solution

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x² + x + 2

y² + x + 3

x² + 3

y² - x² + 8

y² + 9x + 18