Answer: D
Step-by-step explanation:
The x variable should be next to the 15 because it is your rate of change. It isn’t 25 because you add 25 because it’s initial fee. So it y for your total cost. y = 15x + 25
X=-b/2a is the formula for finding the axis of symmetry
So x= -30/2(5)
X=-30/10
X=-3
Because the axis of symmetry is -3, we know where to place our line, and we also know that the parabola is open downwards, which means that the vertex will be maximum. To find the vertex, plug in your values with the axis of symmetry as a midway point. Plug that in for x and so you should have the following:
F(x)
Y(f(x) and y variables are interchangeable) =5(-3)^2-30(-3)+49
Solve for y(f(x))
5(-3)^2-30(-3)+49
(-3)^2=3^2
3^2*5+30*3+49
Multiply
3^2*5+90+49
Add numbers
3^2*5+139
9*5=45
45+139=184
Y=184
So, your vertex would be
(-3,184) and it would be maximum. From there you can plug in the rest of your table of values.
X + x + 1+ x + 2 = -27
3x + 3 = -27
3x = -27 -3
x = -30/3
x = - 10
x + 1 = -10 + 1 = -9
x + = -10 + 2 = -8
answer <span>{-10, -9, -8}</span>
Answer:
-50
Step-by-step explanation:
It has to have x decreasing and y decreasing, along with x getting bigger while y gets smaller, and it has to cross x at -5, 0, and 4 so this is your graph
