x2 + 4x - 21 = 0 quadratic formula

The spring the owner of a sporting good store decreases the price of winter gloves from $10 to $8 each increases the price of swimming goggles from $8 to $10 without doing the math you think the percent decrease in the price of the gloves the same as the percent increase of the goggles explain why or why not

What is the range of the relation in the table below? x y –2 0 –1 2 0 4 1 2 2 0

What value of x is in the solution set of 4x – 12 s 16 + 8x?