The average of 10 numbers is −10. if the sum of 6 of them is 100, what is the average of the other 4? 20pts

Sorry guys but as you have a small brain

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.