9. Which relation represents a function? A. {(−1, 3), (0, −1), (1, 3), (2, 5)}
B. {(1, −1), (−1, 0), (1, 1), (3, 2)}
C. {(5, −1), (3, −1), (4, 1), (5, 2)}
D. {(−4, 2), (1, −2), (0, 0), (1, 1)}

The fraction of the length is the width of the book is 2/3.

What is the fraction?

In Mathematics, fractions are represented as a numerical value, which defines a part of a whole. A fraction can be a portion or section of any quantity out of a whole, where the whole can be any number, a specific value, or a thing.

Given that, the length and width of a book are in the ratio 3:2.

The fraction is 2/3

Therefore, the fraction of the length is the width of the book is 2/3.

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Answer:

y+3=4(x-5)

Step-by-step explanation:

y-y1=m(x-x1)

y-(-3)=4(x-5)

y+3=4(x-5)

The next numbers in the sequence 12, 21, 23, 32, 34, 43, ..... are 45, 54, 56, .....

What is a sequence?

In Mathematics and Geometry, a sequence is a series of real and natural numbers in which each term or list of elements are ordered in a particular order and repetitions are allowed.

By critically observing the sequence, we can logically deduce that it represents an addition series in which both 9 and 2 are added alternatively to the sequence as follows;

12 + 9 = 21

21 + 2 = 23

23 + 9 = 32

32 + 2 = 34

34 + 9 = 43

43 + 2 = 45

45 + 9 = 54.

54 + 2 = 56.

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after each number you had 11

so when you subtract

32-12 = 11

now add this 11 to 43

11+43 = 54

so the next numbers are 45 and 54

I hope that's help ! Please let me know if you have questions !