Modeling with Quadratic Equations — Unit test Answers
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Which statement about the following equation is true?3x2 – 8x + 5 = 5x2
A
The discriminant is less than 0, so there are two real roots.B
The discriminant is greater than 0, so there are two real roots.C
The discriminant is less than 0, so there are two complex roots.D
The discriminant is greater than 0, so there are two complex roots.22
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Use the zero product property to find the solutions to the equation 6x2 – 5x = 56.
A
x = –8 or x =
B
x = or x =
C
x = or x =
D
x = or x =
23
Which equation is y = 9x2 + 9x – 1 rewritten in vertex form?
A
y = 9 (x + one-half) squared minus thirteen-fourths
B
y = 9 (x + one-half) squared minus 1
C
y = 9 (x + one-half) squared + five-fourths
D
y = 9 (x + one-half) squared minus five-fourths
24
The graph below shows the height of a projectile t seconds after it is launched. If acceleration due to gravity is –16 ft/s2, which equation models the height of the projectile correctly?h(t) = at2 + vt + h0
A
h(t) = –16t2 + 42t + 5B
h(t) = –16t2 + 5C
h(t) = –16t2 + 32D
h(t) = –16t2 + 32t + 525
What is the equation of the axis of symmetry of the graph of y + 3x – 6 = –3(x – 2)2 + 4?
A
Option
B
Option
C
Option
D
Option
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