Posted by **Math** on Tuesday, May 5, 2009 at 7:36pm.

I need help with these three problems. I cant figure them out.

3. The difference of two numbers is tripled. The result is decreased by 1. If the lesser of the two numbers is 4 the result is 8.3. Find the greater number.

4. A number increased by 21 is ewuivalent to half the number increased by 18.5. find the number.

11. Kerry comutes 60 mi per day. If she drives 30 mi/h during the morning rush and returns over the same route at 50 mi/h how much time does she typically spend commuting each day.

Please help me and thank you very much!

- Math -
**Riley**, Tuesday, May 5, 2009 at 9:23pm
First set up problems to solve each one assiging variables to each unknown. Remember, you need the same number of problems as you have variables.

- Math -
**RickP**, Tuesday, May 5, 2009 at 10:57pm
Convert the words into one or more mathematical equations. I'll get you going on the first one.

"The difference of two numbers ..."

x - y

"... is tripled."

(x - y) * 3

or equivalently

3(x - y)

"The result is decreased by 1."

3(x - y) - 1

"If the lesser of the two numbers is 4 ..."

y = 4, so we have

3(x - 4) - 1

"the result is 8.3."

3(x - 4) - 1 = 8.3

"Find the greater number. "

solve the above for x.

## Answer this Question

## Related Questions

- math - I have no clue how to figure this out! Can you tell me how to figure it ...
- Algebra - The sum of two numbers is 6. The result when the greater number is ...
- Int Algebra - The difference of two numbers is 7. The sum of the numbers is -1. ...
- Math - Suppose you have two numbers. The difference of the two numbers is 12. ...
- math - the difference of two numbers is 5. their product is 176. what are the ...
- matj - The difference of two numbers is 12. Two fifths of the greater number is ...
- math - The difference of two numbers is 9. The sum of 3 times the greater number...
- algebra 1 - The difference of two numbers is 5. Three times the larger, ...
- Reiny! Reiny! Reiny! Answer Check and HW Help! - Translate to a system of ...
- math... sorry.. 1 more question - sorry but i have 1 more question... the sum of...

More Related Questions