Unit Test — Unit test Answers

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3

Which graph represents the solution to the system of inequalities?

Question illustration
A
On a coordinate plane, a curve approaches the x-axis in quadrant 2 and increase through (0, 1) and (2, 9). An ellipse has center (0, 0) and goes through (4, 0), (0, negative 8), (negative 4, 0), and (0, 8). Everything inside of the ellipse and below the curve is shaded.
Option A
B
On a coordinate plane, a curve approaches the x-axis in quadrant 2 and increase through (0, 1) and (2, 9). An ellipse has center (0, 0) and goes through (4, 0), (0, negative 8), (negative 4, 0), and (0, 8). Everything inside of the ellipse and above the curve is shaded.
Option B
C
On a coordinate plane, a curve approaches the x-axis in quadrant 2 and increase through (0, 1) and (2, 9). An ellipse has center (0, 0) and goes through (8, 0), (0, negative 4), (negative 8, 0) and (0, 4). Everything inside of the ellipse and below the curve is shaded.
Option C
D
Option
Option D
4

The graph of a quadratic inequality is shown.

Question illustration
A
y greater-than-or-equal-to two-ninths (x minus 4) squared + 28
Option A
B
y greater-than (x minus 4) squared + 28
Option B
C
y greater-than-or-equal-to negative 2 (x + 4) squared + 28
Option C
D
y greater-than (x + 4) squared + 28
Option D
10

The graph of a quadratic inequality is shown.

Question illustration
A
y less-than-or-equal-to negative 3 x squared + 36 x minus 96
Option A
B
y less-than negative 3 x squared + 36 x minus 96
Option B
C
y less-than-or-equal-to 3 x squared minus 36 x + 96
Option C
D
y less-than 3 x squared minus 36 x + 96
Option D
11

Review the graph.

Question illustration
A
y ≤ x2 – 8 and x > y2 + 1
B
y ≥ x2 – 8 and x < y2 + 1
C
y ≤ x2 + 1 and x > y2 – 8
D
y ≥ x2 + 1 and x < y2 – 8
12

Which graph represents the solution of x2 + (y – 2)2 8x?

A
On a coordinate plane, a circle has center (0, 2) and radius 3. A parabola opens to the right and goes through (8, 8), has vertex (0, 0), and goes through (4, negative 6). Everything inside of the circle and inside of the parabola is shaded.
Option A
B
On a coordinate plane, a circle has center (0, 2) and radius 3. A parabola opens to the right and goes through (8, 8), has vertex (0, 0), and goes through (4, negative 6). Everything inside of the circle and outside of the parabola is shaded.
Option B
C
On a coordinate plane, a circle has center (2, 0) and radius 6. A parabola opens to the right and goes through (8, 8), has vertex (0, 0), and goes through (4, negative 6). Everything inside of the circle and outside of the parabola is shaded.
Option C
D
Option
Option D
13

Which inequality is less than the quadratic function with zeros –7 and 1 and includes the point on the boundary?

Question illustration
A
y less-than negative three-halves x squared + 9 x + StartFraction 21 over 2 EndFraction
Option A
B
y less-than three-halves x squared + 9 x minus StartFraction 21 over 2 EndFraction
Option B
C
y less-than negative three-halves x squared minus 9 x + StartFraction 21 over 2 EndFraction
Option C
D
y less-than three-halves x squared minus 9 x minus StartFraction 21 over 2 EndFraction
Option D
15

What is the solution, if any, to the inequality ?

Question illustration
A
no solution
B
all real numbers
C
n > 2 or n < 6
D
2 < n < 6

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