Solving Quadratic Equations: Quadratic Formula — Cumulative exam Answers
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Which expression is equivalent to 2x2 – 2x + 7?
A
mc019-1.jpg
B
mc019-2.jpg
C
mc019-3.jpg
D
mc019-4.jpg
42
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In one day, a toy store sold 15 toy cars and 20 yo-yos for a total of $190. The next day, the toy store sold 3 toy cars and 12 yo-yos for a total of $102. What is the cost of one toy car?
A
$1 for one carB
$2 for one carC
$4 for one carD
$8 for one car43
One root of is x = –10. What are all the roots of the function? Use the Remainder Theorem.
A
x = –25 or x = 10B
x = –25, x = 1, or x = 10C
x = –10 or x = 5D
x = –10, x = –5, or x = 544
What is the value of 53i 9?
A
–125iB
–15iC
15iD
125i45
What is the first step in solving the quadratic equation x2 = ?
A
Take the square root of both sides of the equation.B
Add to both sides of the equation.C
Square both sides of the equation.D
Subtract from both sides of the equation.46
Which polynomial is prime?
A
3x3 + 3x2 – 2x – 2B
3x3 – 2x2 + 3x – 4C
4x3 + 2x2 + 6x + 3D
4x3 + 4x2 – 3x – 347
Which model represents the factors of 4x2 – 9?
A
An algebra tile configuration. 5 tiles are in the Factor 1 spot: 2 +x , 3 negative. 5 tiles are in the Factor 2 spot: 2 +x, 3 negative. 25 tiles are in the Product spot in 5 columns with 5 rows. First row: 2 + x squared, 3 negative x. Second row: 2 + x squared, 3 negative x. The last 3 rows are the same: 2 negative x, 3 negative.
B
An algebra tile configuration. 5 tiles are in the Factor 1 spot: 2 +x , 3 +. 5 tiles are in the Factor 2 spot: 2 +x, 3 +. 25 tiles are in the Product spot in 5 columns with 5 rows. First row: 2 + x squared, 3 + x. Second row: 2 + x squared, 3 negative x. The last 3 rows are the same: 1 + x, 1 negative x, 3 negative.
C
An algebra tile configuration. 5 tiles are in the Factor 1 spot: 2 +x , 3 +. 5 tiles are in the Factor 2 spot: 2 +x, 3 negative. 25 tiles are in the Product spot in 5 columns with 5 rows. First row: 2 + x squared, 3 + x. Second row: 2 + x squared, 3 + x. The last 3 rows are the same: 2 negative x, 3 negative.
D
An algebra tile configuration. 5 tiles are in the Factor 1 spot: 2 +x , 3 +. 5 tiles are in the Factor 2 spot: 2 +x, 3 +. 25 tiles are in the Product spot in 5 columns with 5 rows. First row: 2 + x squared, 3 + x. Second row: 2 + x squared, 3 negative x. The last 3 rows are the same: 1 + x, 2 negative x, 3 +.
48
What is the solution to the system of equations?
A
(7, 9)B
(9, 7)C
(–5, 11)D
(11, –5)49
Nathaniel is using the quadratic formula to solve 0 = x2 + 5x - 6. His steps are shown below.What are the solutions to the equation?
A
x = –1, 6B
x = –6, 1C
x = –22, 27D
x = –27, 2250
Which expression is equivalent to i 233?
A
1B
–1C
iD
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