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3 years ago

Which is a prime number? A. 39 B. 49 C. 81 D. 89

Mathematics

2 answers:

Alexus [3.1K]3 years ago

5 0

D: 89 is the prime number.

nataly862011 [7]3 years ago

5 0

The prime numbers include: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107 etc.

The correct answer is D. 89

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What set of numbers are all factors of 18

kifflom [539]

Answer:

2,3,9

Step-by-step explanation:

factors are the smallest numbers that can divide 18completely

7 0

3 years ago

Check all of the expressions that are equal to the one below.

Aloiza [94]

(7-11) • (5) = -20

A. (5) • 7 + (5) • (-11)
↳ 35 + (-55)
↳ 35 - 55 = -20

B. -(-7+11) • (5)
↳ -4 • 5 = -20

C. (5) • 7 - (5) • 11
↳ 35 - 55 = -20

D. (7+11) • (5)
↳ 18 • 5 = 90

A B & C are correct

4 0

3 years ago

Tell me something <333 ^^

nexus9112 [7]

Answer:

Hi I hope you have a wonderful day!!

Step-by-step explanation:

I hope this makes your day :))!

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2 years ago

a pyramid with a square base that is 9 cm on a side has a height of 10 cm the volume of the pyramid is

Zanzabum

$\bf \textit{volume of a pyramid}\\\\
V=\cfrac{1}{3}Bh~~
\begin{cases}
B=area~of\\
\qquad its~base\\
h=height\\[-0.5em]
\hrulefill\\
B=\stackrel{9\times 9}{81}\\
h=10
\end{cases}\implies V=\cfrac{1}{3}(81)(10)\implies V=270$

4 0

3 years ago

The ratio of adult cat to kitten at a pet care center on Thursday was 4:3. There were 12 kittens there that day. Tuesday , 17 ad

emmainna [20.7K]

Answer:

1 adult cat

Step-by-step explanation:

Thursday:

The ratio of adult cat to kitten at a pet care center on Thursday was 4:3.

Number of adult cats = 4x

Number of kitten cats = 3x

There were 12 kittens, then

$3x=12\\ \\x=\dfrac{12}{3}\\ \\x=4\\ \\4x=4\cdot 4=16$

There were 16 adult cats

Tuesday:

17 adult cats were at the pet care center.

Difference:

$17-16=1$ adult cat

5 0

3 years ago