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Let c be the circle with equation x^2+12y+57=-y^2-10x. If (a,b) is the center of c and r  is its radius, what is the value of a+b+r?

 

The graph of $y=ax^2+bx+c$ is given below, where a, b, and c are integers. Find a .

The height (in meters) of a shot cannonball follows a trajectory given by h(t) = -4.9t^2 + 14t - 0.4 at time t (in seconds). As an improper fraction, for how long is the cannonball above a height of 6 meters?

 Feb 6, 2022
edited by Guest  Feb 6, 2022
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1) The center is (10,12) and the radius is 4, so the answer is 10 + 12 + 4 = 26,

 

2) a = 2.

 Feb 6, 2022

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