Questions 7-10: Johnny sister, Jamila, sells chocolate candy bars. Her profit is represented by the function M(x) = 3x – 20, where M(x) represents the money made after x number of candy bars have been sold.
7. How many candy bars would Jamila have to sell to begin making money (meaning that she makes $1)?

the answer is 7 candy bars

Step-by-step explanation:

theres two ways of doing this the equation way and the common sense way m(x) basically just means y so y= 3x -20 we can set y to 0 so 0 = 3x -20 next add 20 to the other side 20 = 3x then divide both sides by 3 you get x= 6.666 but you cant sell .666 of a chocolate bar so round to 7 and thats your answer. the other strategy is saying hey i get $3 per candy bar what number would put be at 21 since 21-20= $1 and we say 7*3 = 21 so 7 is the answer.

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11