Alegra 2 hw

Complete the statements. Graph _____ has one real root. Graph _____ has a negative discriminant. Graph ______ has an equation with coefficients

A(B)C (A)BC AB(C)

Fill in the missing steps for the derivation of the quadratic formula using the choices below.

Step 3: (A)BCD Step 5: AB(C)D Step 6: (A)BCD Step 8: A(B)CD

Determine the number of real solutions each quadratic equation has 4y - 7 = 5x2 - x + 2 + 3y

no real solutions

Determine the number of real solutions each quadratic equation has. y = 12x2 - 9x + 4

no real solutions

Determine the number of real solutions in each quadratic equation has. y = (-x + 4)2

one real solution

The height h (in feet) of an object t seconds after it is dropped can be modeled by the quadratic equationh = -16t2 + h0, where h0 is the initial height of the object. Suppose a small rock dislodges from a ledge that is 255 ft above a canyon floor. Solve the equation h = -16t2 + 255 for t, using the quadratic formula to determine the time it takes the rock to reach the canyon floor.

t 0.87 s (t 4 s) t = 8.5 s t = 16 s

Determine the number of real solutions each quadratic equation has 10x + y = -x2 + 2

two real solutions