SOLUTION: please help me, i can’t understand and solve this 1. 10 years from now Mila will be 21 years old. The current sum of the ages of Mila and Jessie is 43. How old is Jessie right

Algebra ->  Customizable Word Problem Solvers  -> Age -> SOLUTION: please help me, i can’t understand and solve this 1. 10 years from now Mila will be 21 years old. The current sum of the ages of Mila and Jessie is 43. How old is Jessie right      Log On

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Question 1183887: please help me, i can’t understand and solve this
1. 10 years from now Mila will be 21 years old. The current sum of the ages of Mila and Jessie is 43. How old is Jessie right now?
2. The sum of 2 numbers is 18 and their difference is 4. Find the number.
3 If twice the age of Ron is added to the age of his uncle, the sum is 60. But if twice the age of his uncle added to the age of Ron, the sum is 81. Find the ages of the uncle and Ron.
4. 3 pencils and 1 ballpen cost Php 28 and four pencils and seven ballpen costs Php 94. Find the cost of the ballpen and pencil seperately.
5. It took Nilo five thirds of an hour to complete his Math on Wednesday, three fourths of an hour on Thursday, and five sixths of an hour on Friday. How many hours did he take to complete his homework altogether?
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Too many individual exercises.

Picking #3.
r, Ron
u, Uncle
system%282r%2Bu=60%2Cr%2B2u=81%29----------Literal transcription. You should continue this on your own.

Answer by ikleyn(52799) About Me  (Show Source):
You can put this solution on YOUR website!
.

We will be happy teach you and help you,  but under one indispensable condition:


      You will post ONE and ONLY ONE problem per post.



It is the  RULE  and the  POLICY  of this forum.



            Please respect the rules and the tutors.


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This time I will do for you   #  5   only.


5.   It took Nilo five thirds of an hour to complete his  Math on  Wednesday,  three fourths of an hour on  Thursday,
and five sixths of an hour on  Friday.  How many hours did he take to complete his homework altogether? 


    5%2F3  of an hour on Wednesday;

    3%2F4  of an hour on Thursday;

    5%2F6  of an hour on Friday.


They want you ADD these three fractions and find their sum


    5%2F3 + 3%2F4 + 5%2F6


To add fractions, you write them with the common denominator, which is the number 24.


So, I write the fraction (separately) with the common denominator


    5%2F3 = %285%2A8%29%2F%283%2A8%29 = 40%2F24;

    3%2F4 = %283%2A6%29%2F%284%2A6%29 = 18%2F24;

    5%2F6 = %285%2A4%29%2F%286%2A4%29 = 30%2F24.


Now we can easily add our fractions


      5%2F3 + 3%2F4 + 5%2F6 = 40%2F24 + 18%2F24 + 20%2F24 = now I add the numerators and use the common denominator = %2840%2B18%2B20%29%2F24 = 

    = 78%2F24 = %2872%2B6%29%2F24 = %283%2A24%2B6%29%2F24 = 3 6%2F24 = 3 1%2F4 hours = 3 hours and 15 minutes.

The solution is completed.     The answer is   3  hours and  15  minutes.


\\\\\\\\\\\\\\


There is another way to solve the problem.

It is to convert every fraction from hours to minutes and add minutes. 

    5%2F3  of an hour = 5*20 minutes = 100 minutes.

    3%2F4  of an hour = 3*15 minutes = 45 minutes.

    5%2F6  of an hour = 5*10 minutes = 50 minutes.


Total time = 100 + 45 + 50 minutes = 195 minutes = 180 minutes + 15 minutes = 3 hours and 15 minutes.



You get THE SAME answer.

Solved two times by different methods for your better understanding.


Do you understand everything and every step ?

Please let me know.


Happy learning (!)


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In order for better understand your needs,  may I ask a question ?

In your post,  I see the problems for totally different ages and levels.

Problem  5  is for  4th grade level;
problems  3  and  4  are for  7th-8th  grade.


        Why do you combine different level problems into one package ?