Answer:
;-;
Step-by-step explanation:
The function 
sits with its starting point at the origin. The function 
is translated h units to the left or right and k units up or down. Since our radicand, the value under the square root sign, is x+7, putting that into our standard form it would be x-(-7) because minus a negative is a positive. So we move the parent graph to the left (-7 moves to the left) 7 units. There is no number k so our function is not moving up or down. Only to the left 7.
Hey, Melany. To answer this problem, simply set up a proportion: 
. Now let's solve for x.
- Cross multiply:
- Isolate x:
This means that x = 24.
There are 24 9th graders in the band.
Answer:
-10x^2 +9+8x^2-5x+7=-2x^2-5x+16
