# Book 3 Mod 2 SEC 1 Pre-test

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Quizzes Created: 1 | Total Attempts: 64
Questions: 18 | Attempts: 64

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Operations with integers.

• 1.

### -2 + 8

Explanation
The given expression is -2 + 8. When we add -2 and 8 together, we get 6. Therefore, the answer to the expression is 6.

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• 2.

### 5 - 14

Explanation
The given expression is 5 - 14, which equals -9.

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• 3.

### (-4)(-12)

Explanation
The given expression (-4)(-12) can be simplified by multiplying the two negative numbers. When two negative numbers are multiplied, the result is always positive. Therefore, (-4)(-12) equals 48.

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• 4.

• 5.

### -23 + (-5)

Explanation
The given expression is the sum of -23 and -5. When adding two negative numbers, the result is always negative. Therefore, the correct answer is -28.

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• 6.

### -7 - 15

Explanation
The correct answer is -22 because when we subtract -15 from -7, we add the opposite of -15 which is 15. So, -7 + 15 equals 8. Therefore, -7 - 15 is equal to -22.

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• 7.

### (-5)(10)

Explanation
The given expression is the product of -5 and 10. When we multiply a negative number by a positive number, the result is always negative. Therefore, the product of -5 and 10 is -50.

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• 8.

### -100/10

Explanation
The given expression is -100 divided by 10. When we divide -100 by 10, we get -10 as the result. This is because when a negative number is divided by a positive number, the quotient is negative. Therefore, -100 divided by 10 equals -10.

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• 9.

### -4 + 9 - (-12)

Explanation
The given expression is -4 + 9 - (-12). To simplify this expression, we can remove the parentheses by changing the sign of the term inside the parentheses. So, -4 + 9 + 12 equals 17. Therefore, the answer is 17.

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• 10.

### (-3)(6)(-10)

Explanation
The given expression (-3)(6)(-10) can be simplified by multiplying the numbers together. When we multiply -3, 6, and -10, we get -180. However, since the question asks for the absolute value, we take the positive value of -180, which is 180. Therefore, the correct answer is 180.

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• 11.

### (-6)(7) - 8

Explanation
The given expression is (-6)(7) - 8. To simplify this expression, we first multiply -6 and 7, which gives us -42. Then we subtract 8 from -42, resulting in -50. Therefore, the correct answer is -50.

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• 12.

### Evaluate when x = 2 and y = -5 2x + y

Explanation
The given expression is 2x + y. Substituting the values x = 2 and y = -5 into the expression, we get 2(2) + (-5) = 4 - 5 = -1. Therefore, the answer is -1.

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• 13.

### Evaluate when x = 2 and y = -5 xy - 4

Explanation
When x = 2 and y = -5, we can substitute these values into the expression xy - 4. Therefore, we have (2)(-5) - 4 = -10 - 4 = -14. Hence, the answer is -14.

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• 14.

### Evaluate when x = 2 and y = -5 3y - 2x

Explanation
To evaluate the expression 3y - 2x when x = 2 and y = -5, we substitute the given values into the expression. Therefore, we have 3(-5) - 2(2). Simplifying this expression, we get -15 - 4, which equals -19. So, the answer is -19.

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• 15.

• 16.

• 17.

### Solve. One solution is y = 7.  What is the other solution? Remember to answer with the variable.  Ex: y = 10

Explanation
The other solution to the equation is y = -7.

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• 18.

### Solve. -x = 8 Remember to answer with the variable.  Ex: x = 10

Explanation
The equation -x = 8 can be solved by multiplying both sides of the equation by -1. This will give us x = -8, which means that the value of x that satisfies the equation is -8.

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• Current Version
• Jun 26, 2023
Quiz Edited by
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• Mar 05, 2013
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