I need help on a few math problems. 1. The sum of the two digits of a positive i

Question

I need help on a few math problems.

1. The sum of the two digits of a positive integer is 12. When the digits were reversed, the new number was 54 greater than the original. What is the product of the digits of the original number minus the original number?

2. How many possible answer combinations are there to a nine question multiple choice test with five options per question.

3. 1000 ml of a saline solution contained 52% salt. How much water should be added to make the solution 51% water??

Thanks for help !!

Explanation / Answer

Hi..

try

Oh, to make sure you understand which one the answer is for the third part, we would end up with y, 1019.61 ml. But, the problem is asking for how much should be added. That's x. So, the answer for the third problem is x, 19.61 ml

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.