How do I decide whether a relation is a function or not?

The value of n is 5 times as much as the value of m, and also 36 more than the value of m. What is the value of n and m?

More than 20 students participate in a drawing competition. Which number line represents the statement?

Round this number 5,370,288 to the nearest 100,000

Debby, Ella and Unique invest $10,000 each into an oil company. Debby owns 2000 $1 common stocks, Ella owns 1000 of 5% $50 preferred stocks and Unique owns 2000 of 4% $20 preferred stocks. If the company pays $0.

Use properties of rational numbers to multiply the following. -7/10 x 180 A. - 159 B. - 126 C. - 257.14 D. - 3,773

Find the LCM of 6 and 12

The sum of the digits of a two digit number is 6 when the numbers are reversed the number decreases by 18

Central Middle School sold 50 tickets for one night of the school play. Student tickets sold for $2 each and adult tickets sold for$3 each. They took in $135. How many of each type of ticket did they sell?

I have done a math equation for school and i forgot if i could leave a inproper fraction as my answer or if its a fraction i can reduce should i or should i not

Enter the value of n so that the expression (-y + 5) + (7y - 9) is equivalent to (ny - 4)