1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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!

You might be interested in
Help me out Wishing. What are the trigonometric ratios. Write all six.
MAVERICK [17]

Answer:

Sine - opposite : hypotenuse

Cosine - adjacent : hypotenuse

Tangent - opposite : adjacent

Cosecant - hypotenuse : opposite

Secant - hypotenuse : adjacent

Cotangent - adjacent : opposite

3 0
3 years ago
Read 2 more answers
Problem 1:
wariber [46]

Answer:

x=1/6

Step-by-step explanation:

3x+4=9x+3

isolate x

1=6x

1/6=x

6 0
2 years ago
Read 2 more answers
What is 127 as a percent?
kondor19780726 [428]

Hello!

The answer is 127,000%

3 0
3 years ago
A moving sidewalk takes zoo visitors up a hill. The
irina [24]

Answer:

x = 185.458 ft

Step-by-step explanation:

When we draw a picture, we are able to see that we need to use sin∅ to solve this problem:

sin15° = 48/x

xsin15° = 48

x = 48/sin14°

7 0
3 years ago
1. If 9 students sharpen 18 pencils in 2 minutes, how many students will it take to sharpen 18 pencils in 1 minute?
Ad libitum [116K]
A) If 9 students sharpen 18 pencils in 2 minutes,Then if the time is halved, it will take twice as many men to sharpen 18 pencils.Hence it will take 18 students to sharpen 18 pencils in one minute B) y & 1/x. Then y = K/x where K is our constant of proportionality.Then K = yx. When x = -64 and y = -16 then K = -64 * -16 = 1024. Option DC) When x = 3 y = 8. So for an inverse variation K as calculated from B = 3 * 8 = 24.Then when K = 24 and y = 6; we have 24 = 6x. Hence x = 4. Option A
6 0
3 years ago
Other questions:
  • What time will it be 20 minutes after 3:30p.m
    6·2 answers
  • During the first hour of operation the farm stand owner sold 15% of the apples he had. On the second hour he sold 20% of the rem
    15·1 answer
  • Which expression is equivalent to (5y+4) - 2 (7 - 2)
    5·1 answer
  • Solve the equation x2 = 64 for x.
    12·1 answer
  • I need help with this question asappp
    12·1 answer
  • X = 11<br> 1-4x + y = -23<br> Solve the system of equations.
    10·2 answers
  • 4 gallons =_quarts<br> А<br> 8<br> B<br> 16<br> 12<br> D<br> 24
    9·1 answer
  • Solve the equation. \dfrac13 + a = \dfrac54 3 1 ​ +a= 4 5 ​ start fraction, 1, divided by, 3, end fraction, plus, a, equals, sta
    8·1 answer
  • Which function has the same range as
    14·1 answer
  • Fruit Company A recently released a new applesauce. By the end of its first year, profits on this product amounted to $37,100. T
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!