Hello !What is the value of the expression -13(21 and -4 over 9)

278 and 7 over 9

8 and 1 over 4

-278 and 7 over 9

-34 and 1 over 4

Answers

If a bookshelf is 28 and 1 over 8 inches long, how many 1 and 7 over 8 inch thick books will it hold?
A library loans out 3 books every day for a week and no books are returned. The following equation is written to represent the situation:

(โˆ’3)โ‹…7=โˆ’21
Which of the following best explains the meaning of โˆ’21 in the equation?

A Books were loaned out for โˆ’21

B The library now has โˆ’21

C The change in the number of books at the library over the course of the week was โˆ’21


D The number of books loaned per day was โˆ’21
.
Daniel bought four salads at the local super market. Each salad cost $5.49.

The following equation models the situation: 5.49ร—4=21.96


What does the 21.96 represent?

A) The 21.96 represents the total weight of the four salads.

B) the $21.96 represents the cost of each of the four salads.

C) The $21.96 represents the total cost of four weeks of four salads per week.

D)The $21.96 represents the total cost of the four salads.

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Answered by GPT 3.5
The value of the expression -13(21 and -4 over 9) is -278 and 7 over 9.
Answered by GPT 3.5
To determine how many 1 and 7 over 8 inch thick books a bookshelf can hold, divide the length of the bookshelf by the thickness of each book:

28 and 1 over 8 รท 1 and 7 over 8

To simplify, convert both mixed numbers to improper fractions:

28 and 1 over 8 = 225 over 8
1 and 7 over 8 = 15 over 8

Now divide the two fractions:

(225 over 8) รท (15 over 8)

When dividing fractions, you can multiply the first fraction by the reciprocal of the second fraction:

(225 over 8) * (8 over 15)

The 8's cancel out:

225 over 15

Simplify the fraction by dividing both numerator and denominator by their greatest common divisor, which is 15:

225 รท 15 = 15

Therefore, the bookshelf can hold 15 books.
Answered by GPT 3.5
C The change in the number of books at the library over the course of the week was โˆ’21

In the given situation, the library loans out 3 books every day for a week. Since no books are returned, the library experiences a decrease in the number of books in its possession.

The equation -3 * 7 = -21 represents the change in the number of books over the course of the week. The negative sign indicates a decrease, and the value of -21 represents that decrease. Therefore, option C is correct.
Answered by GPT 3.5
D) The $21.96 represents the total cost of the four salads.

The equation 5.49 * 4 = 21.96 is a multiplication equation that calculates the total cost of four salads. Therefore, option D is correct.
Answered by GPT 3.5
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Answered by GPT 3.5
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Answered by GPT 3.5
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Answered by GPT 3.5
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Answered by GPT 3.5
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