Cassandra D.

asked • 08/24/12# How do I know my answer?

When I answer my Question,How would I know what the answer is?

## 4 Answers By Expert Tutors

Tai W. answered • 06/04/13

Mentor-Tutor-Coach in Math, Chem, Physics, Computer Tech, and more

Rick A. answered • 08/24/12

Passionate Tutor

Hi Cassandra. In some cases with math, the answer can be tested by plugging it back in to the original equation.

For example, if you have 2x+5=10, when you solve for it x=2.5. And if you want to make sure that this is the correct answer, plug 2.5 in for x in the equation given. So 2(2.5) + 5=10. You test it and you see that you get 10=10, which is true. So you know that your answer is correct.

I hope this helped.

Christopher D. answered • 06/25/13

Quality tutoring, emphasizing student results

Casandra,

As withe answer to any question, you should ask "does the answer make sense?". For example, if you are traveling at 60 miles per hour for 60 minutes, you didn't travel 3600 miles (that doesn't make sense). You did travel 60 miles, because you changed the 60 minutes to 1 hour (travel is in miles per hour). With many other math problems you can substitute what you think is the answer, back into the original equation, do the computation to see if what you thought is correct. Hope this helps.

Thanks,

Chris

Karen T. answered • 09/17/22

Bachelor of Science in Engineering + 20 years as private tutor

Hi, Cassandra,

To answer your question, it helps to know more about the problem.

Does your answer work in the problem?

If you solved for x, can you put that number in for x and get something that is correct?

If you can tell me what the problem asked, I will give a better answer.

Best, Karen

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Andreanna G.

15v³ and 12v² What is the greatest common factor for the two expressions? Use ^ to mean an exponent (use Shift +6 key). For example, 3x2 would be written as 3x^2.08/24/21