3 years ago

Alica wrote these numbers:2 9 15 21 which of alicas numbers is not a composite number

2 answers:

6 0

Answer:

2 is not a composite number

3 0

Answer:

2, because 2 can only be divided by 1 and itself, and thats what a prime number is

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IrinaK [193]

The answer would be x=4 and y=-2.

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3 years ago

Bad White [126]

I have memorized facts about fractions like these, so can tell you ...

$\dfrac{5}{9}=0.5\overline{5}\\\\-\dfrac{3}{8}=-3\times 0.125=-0.375\\\\-\dfrac{3}{11}=-0.27\overline{27}$

_____

A fraction with 9 as a denominator is a repeating 1-digit decimal with the decimal digit being the numerator of the fraction.

A fraction with 11 as a denominator is a repeating 2-digit decimal with the two digits being 9 times the numerator of the fraction.

1/8 = 0.125, so any multiple of 1/8 is that multiple of 0.125.

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3 years ago

ICE Princess25 [194]

Clue one tells you it ends in a 4 or 9.
Clue two tells you it has to be 9.
Clue three tells you x + 9 = 10
The number is 19

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3 years ago

baherus [9]

27 divided by 40 is equal to 0.675.

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3 years ago

Mekhanik [1.2K]

Step-by-step explanation:

$\csc( - 450 \degree) \\ \\ = - \csc450 \degree \\ \\ = - \csc(360 \degree + 90\degree) \\ \\ = - \csc( 90\degree) \\ \\ = - 1$

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3 years ago