100 to 250 trees ................
Answer:
a = -4
a = 3
Step-by-step explanation:
Hope that helps
We know that the graph goes in units of 1.
We know that the roots are -1 and 4. (Just assume it's accurate and not off by 0.0000000001.)
We can set it up as an equation: -1(x+1)(x-4) = y (I added -1 because there are two parabolas that go through those points on the x-axis, and since this parabola is facing down, I must add a negative a value.
Then multiply (F.O.I.L. - First, Outer, Inner, Last)
x^2 -4x + x - 4 = -(x^2 - 3x - 4) = -x^2 + 3x + 4
Then using -(b/2a) solve for vertex: -(3/-2) = 3/2
Plug 3/2 back into the equation.
-(3/2)^2 + 3(3/2) + 4 = -9/4 + (9/2) + 4 = 25/4
The vertex would be: (3/2, 25/4)
Axis of symmetry would be: x = 3/2
Answer:
The answer to your question is time = 20 min
Step-by-step explanation:
Data
Candace = 480 ft/min
time = 5 min
Brother = 660 ft/min
Process
1.- Calculate the distance traveled by Candace in 5 min
distance = speed xtime
= 480 x 5
= 2400 ft
2.- Write the equations to help solve the problem
Candace distance = 2400 + 480t
Brother distance = 600t
3.- Solve by equality
2400 + 480t = 600t
2400 = 600t - 480t
2400 = 120t
t = 2400/120
t = 20 min
4.- I will solve the equation given
480t = 660(t - 112112)
480t - 660t = -112112
-120t = -112112
t = -112112/-120
t = 934 h I think there is a mistake in the formula you
wrote.
25/50= .5
.5 * 75 = 37.5
37.5
