Answer:
y = -2(x + 1)^2 + 8
Step-by-step explanation:
The equation of a parabola can be written in the form;
y = a(x-h)^2 + k
where a is the multiplier (h,k) is the vertex
so h = -1 and k = 8
Plug in these values
y = a(x + 1)^2 + 8
So to get the value of a, we use the point where the parabola passes through which is the point (1,0)
Simply substitute the values of x and y
0 = a(1 + 1)^2 + 8
0 = a(2)^2 + 8
-8 = 4a
a = -8/4
a = -2
So therefore the equation of the parabola is ;
y = -2(x + 1)^2 + 8
42.52 g
im pretty sure this is the answer
Answer:
1256 cm
Step-by-step explanation:
First we must find the perimeter, because the perimeter is equal to 1 revolution.
The perimeter of any circle is Pi(Diameter)
3.14*20
62.8 cm is the perimeter of the bike wheel.
Because the perimeter is basically a revolution, we can multiply 62.8 by 20 to get:
1256 cm
Answer:
See explanation
Step-by-step explanation:
1. The first figure shows triangular prism. The volume of the triangular prism is

The base of this triangular prism is the triangle with the base of 7 cm and height of
cm (it is not seen).
The base area is

and the volume of the prism is

Just substitute the length of the height and calculate the volume.
2. The second figure shows square pyramid. The volume of the square pyramid is

The base of this square pyramid is the square with the side length of 4 yd.
The base area is

and the volume of the pyramid is
