<span>The vertex of the parabola is the highest or lowest point of the graph.
</span><span>y=-4x^2+8x-12 = -4 (x^2 -2x +3)
Lets work with this now: </span>x^2 -2x +3
x^2 -2x +3 -> what is the closeset perfect square?
x^2 -2x +1 = (x-1)^2
So
x^2 -2x +3 = (x-1)^2 +2
Replacing to original
y=-4x^2+8x-12 = -4 (x^2 -2x +3) = -4 ((x-1)^2 +2) = -4 (x-1)^2 - 8
The min or max point is where the squared part = 0
So when x=1 , y= -4*0-8=-8
This will be the max of the parabola as there is - for the highest factor (-4x^2)
The max: x=1, y= -8
As the time go the grass height go through increasing and decreasing
5^8 / 5^12 = 5^(8-12) = 5^-4 = 1/5^4
Given that a<span> passenger elevator in the sears tower in Chicago can lift people 960 feet in 1 minute and 30 seconds (1.5 minutes). This means that the lift is travelling with a speed of:
</span>
<span>
If the elevator lifts cargo through the same height in 2 minutes and 30 seconds (2.5 minutes), then the speed is given by:
</span>
<span>
</span>
Answer:
All answers are in explanation
Step-by-step explanation:
7.74 + 9.281 = 13.055
8.2 x 4.3 = 35.26
32.5 x 6.88 = 223.6
37.4 ÷ 5.5 = 6.8
16.85 ÷ 5 = 3.37
35.75 + 55.50 x 2 = 146.75
I answered those questions which make sense some of your questions doesn't make any sense
