Answer:
y = 15(x -10)^2 -1560
Step-by-step explanation:
It usually works well to divide the leading coefficient from the x terms:
y = 15(x^2 -20x) -60
Now, add the square of half the x-coefficient inside parentheses. Subtract the same amount outside.
y = 15(x^2 -20x +100) -60 -(15)(100)
y = 15(x -10)^2 -1560 . . . . . collect terms; write the parentheses as a square
50 per share hope this helped
If S is students and n is nonstudents
S = 3n + 11
541 = 6(3n + 11) + 7n
541 = 18n + 66 + 7n
475 = 25n
n = 19
19 nonstudents so then you put that number in the first equation
S = 3(19) + 11
S = 68
68 students attended the movie