If y refers to the cost and x refers to the number of hours, what is the correct mathematical model of the situation given in item 18? a. y = 15x + 10 b. y = 10x + 15 c. y = 15x – 10d. y = 10x – 15

answer:

mag lagay ka ng isang galon ng tubig

step-by-step explanation:

let n = ratio

math equation:

4n + 5n = 27

solve for n:

4n + 5n = 27

9n = 27

n = 3

solve and check for two numbers

substitute n

4n + 5n = 27

4(3) + 5(3) = 27

12 + 15 = 27

27 = 27 true