Is this parallel perpendicular or neither?

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

What other information do you need to prove triangle dac=bca by asa

Which equation shows the quadratic formula used correctly to solve 5x2 + 3x -4 0 for x? cos -3+ v (3) 2-4() 2(5) 3+ |(3)² +4() 205) 3+ (3) 2-4() -3+ v (3)² +4()