Evaluate the expressions given the values of the variables. 5m - 2n
7. m = 4 and n = 3
2. m = 10 and n = 12
3. m = 21 and n = 15
4. x = 3 and y = 7
5.x = 11 and y = 23​

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice

r = 78539458390583095803458309458039485093485 or just 3

step-by-step explanation:

proportions are fractions that equal to each other. so if two fractions are the same, they are proportional.

let's check the answers to see if they are proportional.

question a is not proportional because you can't turn 1.5/3 to 3/9. if you try to multiply 1.5/3 by 2 or 3, you wont get 3/9. it's impossible to make the fractions the same.

question b is not proportional because you can't turn 22/33 to 4/6. 33 can't go into 6.

question c is proportional because when you multiply 2 and 3 by 71, you would get 142/213, and those fractions equal to each other

question d is proportional because when you divide 14 and 7 by 2, you would end up with 7/3.5, and those fractions equal to each other.