Sam is 12 years older than Matt. Five years ago the sum of their ages was 28. How old are they now?

Write a system of equations to represent this situation.

Define your variables

y=x+12

(y-5) + (x+5)=28, where x = present age of Matt ( in years).

and  y= present age of Sam.

Step-by-step explanation:

Let x be the present age of Matt ( in years).

and  Sam's present age = y years

5 years's ago,

Sam's age = y-5 years

Matt's age = x-5 years

As per given,

y=x+12     (i)

and (y-5) + (x+5)=28   (ii)

Required system of equations:

y=x+12

(y-5) + (x+5)=28, where x = present age of Matt ( in years).

and  y= present age of Sam.

there would only be 50 odd numbers between 1 and 100 so therefor there would be 50 even so that would only be 50 odd numbers.

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.