If 5 men or 7 women can earn $315 in a day, find how much 7 men and 11 women can earn in three days ?

2808

Step-by-step explanation:

If 5 men can earn 315 dollars in a day then each of them can earn 63 dollars per day. If 7 women can earn 315 dollars in a day then each of them can earn 45 dollars per day. 7*63=441  11*45=495

441+495=936  But we aren't done yet! We only calculated the amount of wage 7 men and 11 women can earn in 1 day. So, to find out how much they earned in 3 days we have to multiply by 3

936*3=2808

So the answer is 2808 dollars.

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for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for