Y=-.3x^2+3x
....
-2x+5.5y=19.5
5.5y=19.5+2x
y=(19.5+2x)/5.5
When the light touches the parabola y=y so
(19.5+2x)/5.5=-.3x^2+3x multiply both sides by 5.5
19.5+2x=-1.65x^2+16.5x add 1.65x^2 to both sides
1.65x^2+2x+19.5=16.5x subtract 16.5x from both sides
1.65x^2-14.5x+19.5=0
Using the quadratic equation for simplicity...
x=(14.5±√81.55)/3.3 we only need the lower point, or the smaller value of x
x≈1.657423 since:
y=(19.5+2x)/5.5
y≈4.15 units
Divide 4 7/8 by 3/8:
or 39/8 by 3/8. We can drop the denominators 8 and 8 and find 39/3 = 13.
This guy needs 7 more pieces to end up with 20 pieces.
Answer:
D. 8/9
Step-by-step explanation:
Calculators Rock!!!
The line goes down 3 over to the right 4
-3/4
Choice B
The slope is -500. The bird descends......
3 boxes are filled every 4 minutes
.75 boxes are filled per minute
3 laps per minute is line B