When tom found found the difference -11 - (-4) he got an answer of -15. what might tom have done wrong?

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

How much orange juice do you need to make 2 servings of lemony orange slush?

Prism m and pyramid n have the same base area and the same height. cylinder p and prism q have the same height and the same base perimeter. cone z has the same base area as cylinder y, but its height is three times the height of cylinder y. the figures and have the same volume.