MHB Are My Answers Correct for These Ratio Math Problems?

[Alexstrasuz1]

Hellow I did these three math problems and I wonder if my answers are right.

(1.03 : 10^-1 + 17) : (4.5^-1 + 5/18)^-2 my answer here is 3.

(0.2 : 10^-2 -2 ) : (1/0.9 - 1)^-1 my answer here is 2.

Now the last one
1/a^2+a - a+2/a+1 + a+1/a and here my anser is 2.

Thank you.

 

[anemone]

Hellow I did these three math problems and I wonder if my answers are right.

(1.03 : 10^-1 + 17) : (4.5^-1 + 5/18)^-2 my answer here is 3.

(0.2 : 10^-2 -2 ) : (1/0.9 - 1)^-1 my answer here is 2.

Now the last one
1/a^2+a - a+2/a+1 + a+1/a and here my anser is 2.

Thank you.

Hello Alexstrasuz, welcome to MHB!

Your way of expressing the mathematics expressions are quite confusing. Please help us to clarify the three mathematics expressions that you have typed there so that we can help you.:)

My advice is use the parentheses when necessary, take your second mathematics expression for example, if you meant $\left(\dfrac{0.2}{10^{-2}}-2\right):\left(\dfrac{1}{0.9}-1 \right)^{-1}$, you can express it as [(0.2)/(10^(-2)) -2]/[(1)/(0.9)-1]^(-1).

 

[Alexstrasuz1]

View attachment 3004
Here you go a image

 

[anemone]

View attachment 3004
Here you go a image

Question 1:

If 17 is a typo and it is meant to be 1.7, then 3 is the correct answer.

Question 2:

Correct.

Question 3:

Wrong. Show your working so that we can guide you through it.

On another note, I want to remind you that it's best to use the title that is brief with the best description of what your question is about, this is to improve the chance of your thread being viewed and answered by our helpers. I will hence rename the title of this post as "How to simplify ratio", don't you agree that sounds like more of a suitable title for this thread

Also, we encourage students do not ask more than two questions in a thread or post. It is better both for forum organization, and better for you to get your questions answered in a more timely manner.

 

[Alexstrasuz1]

Is the answer to third question 2/ (a^2)+2

 

[anemone]

Is the answer to third question 2/ (a^2)+2

I'm sorry, but nope. You are wrong again this time. Can you show us your working so that we can pinpoint the exact step where you did wrong?

 

[Alexstrasuz1]

View attachment 3005

Here you go.
Ty for leading me how to use forum. Ill post by the rules next time.

 

[anemone]

Do you notice how you mentioned of you gotten $\dfrac{2}{a^2}+2$ but in fact, you have obtained the right answer $(\dfrac{2}{a^2+a})$ for the third question

I believe you are quite capable in simplifying ratios, keep up the good work!

 

[Alexstrasuz1]

Yea, I just noticed that. Thank you for motivation words, I always loved math but I did stupid things when HS started so I am trying to get back into shape for college next year. :)