How many solutions do the following equations have ?

What is this inequality notation? t is less then or equal to 2

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)