A baseball is projected upward at 64 feet per second. It can be approximated by the equation -16t2+64t. The baseball reaches it maximum height at the vertex. That can be gotten from x= −2−b2a. How long until the baseball reaches its full height? Note a quadratic equation can be written as ax2+bx+c

these sign is used to tell weather the number is greater or less than the number   <   or >     but this sign means its equal =    

hope this you and

step-by-step explanation:

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a