2. Kirsten and Gigi are riding in hot air balloons. They start 500 feet above the ground. Kirsten’s balloon rises 225 feet, falls 105 feet, and then rises 445 feet. Every time Kirsten’s balloon travels up or down, Gigi’s balloon travels 15 feet farther in the same direction. Then both balloons stop moving so a photographer on the ground can take a picture.

answer: 7

step-by-step explanation: cause i checked it

7

step-by-step explanation:

-2

7 - 9 = -2

reversed:

-2 + 9 = 7

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204