Mathematics Questions and Answers – Linear Equations Solutions

«
»

This set of Mathematics Multiple Choice Questions and Answers for Class 9 focuses on “Linear Equations Solutions”.

1. Which of the following is the solution for 2x+4y=12?
a) x=2, y=2
b) x=1, y=0
c) x=3, y=1
d) x=-1, y=4
View Answer

Answer: a
Explanation: To find the solution of given equation, put the respective values of x and y in the given equation. If it satisfies the equation, it is the solution of given equation.
Let’s check the values given in option a, which are x=2,y=2.
2(2) + 4(2) = 4 + 8 = 12
Which satisfies the equation 2x+4y=12
Hence, it is the solution of the given equation.
advertisement

2. What are the number of solutions of linear equation 2x+4y=12?
a) One
b) Two
c) Three
d) Infinite
View Answer

Answer: d
Explanation: To find the solution, we can select arbitrary value of either x or y and we will get the appropriate value of the other variable.
Suppose we take value of x=0, then we get 2(0) + 4y=12
y=12/4
Therefore, y=4
Now, for x = 1, we get 2(1) + 4y = 12
4y=12-2=10
Therefore, y = 10/4
y = 2.5
Likewise, we can get infinite solutions by taking arbitrary values of either x or y.

Sanfoundry Global Education & Learning Series – Mathematics – Class 9.

advertisement
advertisement

To practice Mathematics Multiple Choice Questions and Answers for Class 9, here is complete set of 1000+ Multiple Choice Questions and Answers.

Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Join our social networks below and stay updated with latest contests, videos, internships and jobs!

advertisement
advertisement
Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer & SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage, Advanced C Programming, SAN Storage Technologies, SCSI Internals & Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him @ LinkedIn | Youtube | Instagram | Facebook | Twitter