Tony spent on books to give away as prizes to his students. At the store, he bought more books than planned, spending per book. Which equation can be used to find the number of books he originally wanted to buy, ?

step-by-step explanation:

just plug in each number for x and see which ones work and don't

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation:

constant of proportionality = 3 and the equation is c = 3p.

step-by-step explanation:

c = kp   where c = amount of caffeine in mg., p = oz of pepsi and k is the constant of proportionality.

substituting the values given:

24 = 8k

k = 3.

the same value of k will be obtained if we substitute the other given values.