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Annette [7]
3 years ago
6

Which of these numbers is a prime number: 1, 11, 21, 51?

Mathematics
1 answer:
statuscvo [17]3 years ago
5 0

Answer:

11 and 51

Step-by-step explanation:

1 technically isn't a prime since a prime can only be divided by two things (itself and 1) and 1 can only be divided by 1.

21 can be divided by 1, 3, 7, and 21 so it is not prime.

Hope this helps!

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In the right triangle shown, m∠A = 30 degrees, and BC = 6√2, how long is AC?
mart [117]

They're trying to trick you with √2.  Remember in the 30/60/90 triangle the sides are in ratio 1:√3:2, with the "1" opposite the 30 degrees.

Here we have

1:√3:2  = 6√2:x:hypotenuse

or

x/(6√2) = √3/ 1

x = 6√2×√3 = 6√6

Answer: AC=6√6

3 0
3 years ago
Which of the following fractions have the same value as 16 ÷ (–3)? Check all that apply.
Snowcat [4.5K]

Answer:

StartFraction 16 over negative 3, EndFraction StartFraction negative 16 over 3, and EndFraction Negative (StartFraction 16 over 3 EndFraction)

I hope this helps

Step-by-step explanation:

4 0
2 years ago
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James estimated the total cost of groceries to be $50.
Lilit [14]
The answer is 30%.... because 50/65 is .3
5 0
3 years ago
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12 _ (7 - 4) +5 _ 3 = 19
anygoal [31]

The first blank is "division" and the second blank is "multiplying"

12 / (3) = 4

5 x 3 = 15

15 + 4 = 19

7 0
3 years ago
Hey need help with some homework my teacher did not explain this very well so could you help me answer it and explain how iis do
Diano4ka-milaya [45]
<span>y in (-oo:+oo)

(3*y+6)/11 = -9 // + 9

(3*y+6)/11+9 = 0

(3*y+6)/11+(9*11)/11 = 0

3*y+9*11+6 = 0

3*y+105 = 0

(3*y+105)/11 = 0

(3*y+105)/11 = 0 // * 11

3*y+105 = 0

3*y+105 = 0 // - 105

3*y = -105 // : 3

y = -105/3

y = -35

y = -35</span>
7 0
3 years ago
Read 2 more answers
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