N/A — Exam Answers

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63

If the discriminant of a quadratic equation is equal to negative 8 , which statement describes the roots?

A
There is one real root.
B
There are two real roots.
C
There are two complex roots.
D
There is one complex root.
65

The cost to rent skis at a local sporting goods store is 15 dollars plus 20 dollars per day. Which equation models the relationship between the total cost to rent, c , and the length of the rental in days, d ?

A
c is equal to open paren 15 plus d close paren times 20
B
c is equal to open paren 15 plus 20 close paren times d
C
c is equal to 15 d plus 20
D
c is equal to 20 d plus 15
67

The height of an arch is modeled by the equation y is equal to negative x squared minus 6 x plus 16 Which of the following gives the width of the arch at its base?

A
double the x -coordinate of the vertex
B
the y -intercept of the equation
C
the y -coordinate of the vertex
D
the difference between the zeroes
69

The function cap c times x is equal to 400 x minus 0 point 2 x squared represents the total costs for a company to produce a product, where cap c is the total cost in dollars and x is the number of units sold. Which statement is true?

A
Two thousand units have the minimum cost of 800 dollars comma 000 .
B
Two thousand units have the maximum cost of 800 dollars comma 000 .
C
One thousand units have the maximum cost of 200 dollars comma 000 .
D
One thousand units have the minimum cost of 200 dollars comma 000 .
70

Which pair of equations generates graphs with the same vertex?

A
y is equal to open paren x minus 4 close paren squared and y is equal to x squared plus 4
B
y is equal to negative open paren x plus 4 close paren squared and y is equal to open paren x minus 4 close paren squared
C
y is equal to negative 4 x squared and y is equal to 4 x squared
D
y is equal to negative x squared minus 4 and y is equal to x squared plus 4
71

What is the solution to the system of equations? 4 x minus 5 y is equal to negative 17 x plus 6 y is equal to 61

A
open paren negative 5 comma 11 close paren
B
open paren 7 comma 9 close paren
C
open paren 9 comma 7 close paren
D
open paren 11 comma negative 5 close paren
72

Which inequality has a solid boundary line when graphed?

A
y plus 7 x is greater than 7
B
y plus x is less than or equal to 7
C
x plus 7 y is greater than 7
D
x plus y is less than 7
73

Tickets for the school play sell for 4 dollars each. Which graph shows the relationship between the number of tickets sold x and the total income from the tickets y ?

A
Image with description On a coordinate plane, tickets sold are shown on x-axis from 0 to 18 and dollars collected shown on y-axis from 0 to 14. A straight line stats at the origin and moves through the points (4 comma 1) and (2 comma 8).
B
Image with description On a coordinate plane, tickets sold are shown on x-axis from 0 to 18 and dollars collected shown on y-axis from 0 to 14. A straight line is drawn starting from (0 comma 4) and going parallel to the x-axis,
C
Image with description On a coordinate plane, tickets sold are shown on x-axis from 0 to 18 and dollars collected shown on y-axis from 0 to 14. A straight line is drawn which starts from (0 comma 4) and moves through the points ( 2 comma 6) and (4 comma 8).
D
Image with description On a coordinate plane, tickets sold are shown on x-axis from 0 to 18 and dollars collected shown on y-axis from 0 to 14. A straight line is drawn starting from the origin and passing through the points (1 comma 4) and (2 comma 8).
78

Which inequality has a solid boundary line when graphed?

A
y is greater than negative 1 ninth x
B
y is less than negative x minus 9
C
y is less than 1 ninth x plus 9
D
y is greater than or equal to 9 x plus 9
80

Which graph represents y is equal to negative 2 x ?

A
Image with description On a coordinate plane with x and y axes marked with negative 6 to 6, a straight line goes from quadrant 3 to quadrant 1. It passes through the points (negative 4 comma negative 2), (negative 2 comma 0), (0 comma 2) and (2 comma 4).
B
Image with description On a coordinate plane with x and y axes marked with negative 6 to 6, a straight line goes from quadrant 2 to quadrant 4. It passes through the points (negative 4 comma 20, (0 comma 0), and (2 comma negative 1)
C
Image with description On a coordinate plane with x and y axes marked with negative 6 to 6, a straight line passes from quadrant 2 to quadrant 4. It passes through the points (negative 2 comma 4), (0 comma 0) and ( 2 comma negative 4).
D
Image with description On a coordinate plane with x and y axes marked with negative 6 to 6, a straight line passes from quadrant 4 to quadrant 1. It passes through points (negative 2 comma negative 4), (0 comma negative 2) and (4 comma 2).

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