7th CRCT Review 4-13-12

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| By AKBailey

AKBailey

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Quizzes Created: 1 | Total Attempts: 88

| Attempts: 88

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1/17 Questions

Find the value of the expression -16.1 + 3.8 - (-12.24).

About This Quiz

Adding, Subtracting, Multiplying, and Dividing Integers Writing and Simplifying Algebraic Expressions

2.

-15 - (-11)=
- -29
- -4
- 4
- 29
Correct Answer

A. -4

Explanation

The given expression is a subtraction problem where we have to subtract a negative number from another negative number. When we subtract a negative number, it is equivalent to adding its positive value. So, -15 - (-11) can be rewritten as -15 + 11. This gives us -4 as the result.

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3.

Translate the words into an algebraic expression. 2 less than the product of 7 and a number n.
- 2n + 7
- 14 + n
- 12n
- 7n - 2
Correct Answer

A. 7n - 2

Explanation

The given statement says "2 less than the product of 7 and a number n." This can be translated into the algebraic expression "7n - 2," where n represents the unknown number. The expression represents multiplying 7 and n, and then subtracting 2 from the result.

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4.

Which of the following shows the expression below in simplest form? 5m - 3m + 6m
- -4m
- 8m
- 12m
- 2m + 6m
Correct Answer

A. 8m

Explanation

The expression 5m - 3m + 6m simplifies to 8m. The terms with the variable m are combined by adding or subtracting their coefficients. In this case, 5m - 3m + 6m simplifies to 8m, as the coefficients of m add up to 8.

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5.

The Hamied family stayed at a hotel for n nights. The cost was $80 per night plus a one-time fee of $20 because they brought their dog. Which expression represents the total cost of their hotel stay?
- 80n + 20n
- 80n + 20
- 80 + 20n
- 80 + 20 + n
Correct Answer

A. 80n + 20

Explanation

The expression 80n + 20 represents the total cost of the Hamied family's hotel stay. The variable n represents the number of nights they stayed at the hotel. Since the cost per night is $80, multiplying it by the number of nights (80n) gives the cost of the nights. Additionally, there is a one-time fee of $20 because they brought their dog, which is represented by the constant term 20. By adding these two terms together, we get the total cost of their hotel stay.

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6.

What is the value of the expression below when c = 4? 4c + 3c - 2c
- 40
- 36
- 28
- 20
Correct Answer

A. 20

Explanation

When c = 4, the expression becomes 4(4) + 3(4) - 2(4), which simplifies to 16 + 12 - 8. Combining like terms, we get 20.

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7.

A scuba diver is 24 feet below sea level. A parasail glider is 59 feet above sea level. How far above the scuba diver is the parasail glider?
- 93 feet
- 83 feet
- 73 feet
- 35 feet
Correct Answer

A. 83 feet

Explanation

The parasail glider is 59 feet above sea level and the scuba diver is 24 feet below sea level. To find how far above the scuba diver the parasail glider is, we need to add the two distances together. 59 + 24 = 83. Therefore, the parasail glider is 83 feet above the scuba diver.

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8.

Which expression represents the phrase below? 83 less than a number n
- 83 - n
- N - 83
- 83/n
- N/83
Correct Answer

A. N - 83

Explanation

The phrase "83 less than a number n" implies that we are subtracting 83 from the number n. Therefore, the expression that represents this phrase is n - 83.

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9.

-4 + 9=
- 13
- -13
- 5
- -5
Correct Answer

A. 5

Explanation

The given equation is -4 + 9. When we add -4 and 9, we get the result 5. Therefore, the correct answer is 5.

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10.

-12 - (-6) =
- 18
- 6
- -6
- -18
Correct Answer

A. -6

Explanation

The given expression is a subtraction problem where we have -12 minus -6. When subtracting a negative number, it is equivalent to adding its positive counterpart. Therefore, -12 minus -6 can be rewritten as -12 + 6. Adding -12 and 6 gives us -6 as the answer.

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11.

Bob started the day with a score of -4. He gained 3 points, lost 4 points, and then gained 6 points. What was his score then?
- +9
- +6
- +1
- -1
Correct Answer

A. +1

Explanation

Bob started with a score of -4. He gained 3 points, which brings his score to -4 + 3 = -1. He then lost 4 points, which means his score is now -1 - 4 = -5. Finally, he gained 6 points, which brings his score to -5 + 6 = +1.

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12.

-2.9 - 4.5 =
- 7.4
- 1.6
- -1.6
- -7.4
Correct Answer

A. -7.4

Explanation

The given question asks for the result of subtracting -4.5 from -2.9. When subtracting a negative number, it is equivalent to adding the positive value of that number. Therefore, subtracting -4.5 is the same as adding 4.5. Thus, -2.9 + 4.5 equals -7.4.

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13.

Lou had r rocks in his collection. He separated his rock into 3 equal piles. He now has 12 rocks in each pile. Which equation represents the situation?
- R - 3 = 12
- R/3 = 12
- R + 3 = 12
- R x 3 = 12
Correct Answer

A. R/3 = 12

Explanation

Lou had r rocks in his collection and he separated them into 3 equal piles. This means that each pile has the same number of rocks. If he now has 12 rocks in each pile, this can be represented by the equation r/3 = 12.

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14.

Which is equivalent to the expression below? 6(2k - 3)
- 8k - 3
- 9k
- 12k - 3
- 12k - 18
Correct Answer

A. 12k - 18

Explanation

The given expression is 6(2k - 3). Distributing the 6 to both terms inside the parentheses, we get 12k - 18. Therefore, the expression 12k - 18 is equivalent to 6(2k - 3).

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15.

Which is equivalent to the expression below? 4a + 5 - a + 2
- 10a
- 11a
- 3a + 7
- 4a + 7
Correct Answer

A. 3a + 7

Explanation

The given expression is 4a + 5 - a + 2. To simplify this expression, we can combine like terms. The terms 4a and -a can be combined to give 3a. The terms 5 and 2 can be combined to give 7. Therefore, the equivalent expression is 3a + 7.

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16.

What is the sum? 5k + 4 + (6 - 2m)
- 5k -2m + 10
- 3k + m + 10
- 5k + 2m + 10
- 10k + 3m
Correct Answer

A. 5k -2m + 10

Explanation

The given expression is 5k + 4 + (6 - 2m). Simplifying the expression, we get 5k - 2m + 10. Therefore, the correct answer is 5k - 2m + 10.

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17.

What is the difference? 5r + 3 - (1 + 6r)
- -11r + 2
- -2r + 2
- -r + 2
- 11r + 2
Correct Answer

A. -r + 2

Explanation

The given expression is 5r + 3 - (1 + 6r). To simplify this expression, we can distribute the negative sign inside the parentheses, which gives us 5r + 3 - 1 - 6r. Combining like terms, we have -r + 2. Therefore, the correct answer is -r + 2.

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Quiz Edited by
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Apr 11, 2012

Quiz Created by
AKBailey

7th CRCT Review 4-13-12

Find the value of the expression -16.1 + 3.8 - (-12.24).

Quiz Preview

-15 - (-11)=

Translate the words into an algebraic expression. 2 less than the product of 7 and a number n.

Which of the following shows the expression below in simplest form? 5m - 3m + 6m

The Hamied family stayed at a hotel for n nights. The cost was $80 per night plus a one-time fee of $20 because they brought their dog. Which expression represents the total cost of their hotel stay?

What is the value of the expression below when c = 4? 4c + 3c - 2c

A scuba diver is 24 feet below sea level. A parasail glider is 59 feet above sea level. How far above the scuba diver is the parasail glider?

Which expression represents the phrase below? 83 less than a number n

-4 + 9=

-12 - (-6) =

Bob started the day with a score of -4. He gained 3 points, lost 4 points, and then gained 6 points. What was his score then?

-2.9 - 4.5 =

Lou had r rocks in his collection. He separated his rock into 3 equal piles. He now has 12 rocks in each pile. Which equation represents the situation?

Which is equivalent to the expression below? 6(2k - 3)

Which is equivalent to the expression below? 4a + 5 - a + 2

What is the sum? 5k + 4 + (6 - 2m)

What is the difference? 5r + 3 - (1 + 6r)