Legit way is vertex form
easy way is this
x value of vertex in form
f(x)=ax^2+bx+c is -b/2a
the y value is f(x value of vertex)
so
p(x)=-0.5x^2+40x-300
x value of vertex is -40/(2*-0.5)=-40/-1=40
max profit selling 40 per week
profit would be 500
Add the numbers they gave you and subtract it from the total to get the unknown so 100-(24+42)=34 as a decimal it will be .34 and as a percent it is 34%.
3/1 you simplify it down hope this helps
Answer:
C, 7 1/2
Step-by-step explanation:
You add all of the fractions together.
Answer:
(x) = 
Step-by-step explanation:
let y = f(x) and rearrange making x the subject
y = - 8x + 4 ( add 8x to both sides )
8x + y = 4 ( subtract y from both sides )
8x = 4 - y ( divide both sides by 8 )
x = 
Change y back into terms of x
(x) = 