A box is to be made by cutting squares measuring 4 centimeters on a side from the square piece of cardboard as shown. If the volume of the box is to be 100 cubic centimeters, find the length of a side of the original square.

X+y=-4 x-y=2 use elimination with adding and subtraction

The function y= x - 4x+ 5 approximates the height, y, of a bird, and its horizontal distance, x, as it flies from one fence post to another. all distances are in feet. complete the square to find and interpret the extreme value (vertex). select two answers: one extreme value and one interpretation.

Ineed with question three. i don't understand how i'm supposed to achieve 3 marks.