2. identify the quadratic function from the choices below whose parabola opens upward.

a. y = 3x – 5x2
b. y = 4x2 – 6x – 2
c. y = 7x – 3x2 + 7
d. y = 100 – 4x2

Which elements in the set below are integers? 12, –3⁄4,√ 25 , –7, √ 5 , 14⁄7, 9 a. 12, √ 25 , –7, 9 b. 12, √ 25 , –7, 14⁄7, 9 c. –3⁄4, 25 , √ 5 ,14⁄7 d. 12, –7, 9

X2 + y 2 = 36 x + y = 6 solve the system of equations.

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122