I believe that x = 2 and y = -2
3/8 + 2/8 = 5/8
8/8 - 1/8 = 7/8
7/8 - 5/8 = 2/8 = 1/4
he used 1/4 to paint the bird house.
Answer:
The unit rate is 20.8 ft/ sec.
Step-by-step explanation:
It is given that the displacement of 644.8 ft in 31 s.
When the rate is define in the quantity of 1, then it is called unit rate.
In 31 s the displacement is 644.8 ft.
Divide both sides by 31,
For one second the value of the displacement is 20.8.
Therefore the unit rate for 644.8 ft in 31 s is 20.8 ft/sec.
Thank you for posting the figure. Without it, I would have thought the parabola has a vertical axis.
For a parabola with a horizontal axis (as in this case), the equation of the parabola is
f(y)=a(y-k)^2+h
where (h,k) is the vertex.
Substituting (h,k)=(2,-4),
f(y)=a(y+4)^2+2...................(1)
as the equation of the parabola, with the value of "a" yet unknown.
Since we are given that the parabola passes through the point (-3,-3), we can substitute the corresponding x,y values in (1) to solve for a.
f(y)=-3=a(-3+4)^2+2
solve for a
a=(-3-2)/(1^2)=-5
So the equation of the parabola is f(y)=-5(y+4)^2+2
