Answer:
Answer is D: (5,4,-11), 9 sqrt2
Step-by-step explanation:
{ x + 2y = 4 * ( 3 )
-3 x + 2y = -4
3 x + 6 y = 12
-3 x + 2 y = -4
---------------------
8 y = 8
y = 8 / 8
y = 1
For x :
x + 2 y = 4
x + 2*(1 ) = 4
x + 2 = 4
x = 4 - 2
x = 2
Answer C ( 2 , 1 )
hope this helps!
Answer:
![y=-x^2+3x+11](https://tex.z-dn.net/?f=y%3D-x%5E2%2B3x%2B11)
Step-by-step explanation:
The given data table is
Number of seconds : 0 1 2
Height (in feet) : 11 13 13
We need to find quadratic regression equation that fits these data.
The general form of quadratic regression equation is
.... (1)
Using the graphing calculator we get
a = -1 , b = 3 and c=11
Substitute these values in equation (1), to find the quadratic regression equation that fits these data.
![y=(-1)x^2+(3)x+(11)](https://tex.z-dn.net/?f=y%3D%28-1%29x%5E2%2B%283%29x%2B%2811%29)
![y=-x^2+3x+11](https://tex.z-dn.net/?f=y%3D-x%5E2%2B3x%2B11)
Therefore, the quadratic regression equation that fits the data is
.
Answer:
Step-by-step explanation:
The right triangles are all similar, so corresponding sides are in proportion.
short side / hypotenuse = 5/x = x/17
x^2 = 85
x = √85 ≈ 9.2
__
short side / long side = 5/y = y/12
y^2 = 60
y = √60 ≈ 7.7