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
algol [13]
3 years ago
6

Is 21 a prime number?

Mathematics
2 answers:
Marina CMI [18]3 years ago
8 0
21 is not a prime number, its a composite number because its divisible by 3 and 7
and prime numbers only have 1 and its self as factors..
Hope it helps :D

AleksandrR [38]3 years ago
3 0
No.
7×3=21
7×1=21
A prime number can only be multiplied by 1 and itself.
You might be interested in
PLZ HELP ASAP!!!!!!!! Read the question on question 10 and answer it.
larisa [96]

Answer:

31x+74y=p

31(9)+74(4)=p

279+256=525

Step-by-step explanation:

8 0
4 years ago
Read 2 more answers
Y = x-2<br> y = 3x+4. Solutions of system of equation
Aliun [14]

Answer:

x=-3 and y=-5

Step-by-step explanation:

hope this helps!

5 0
3 years ago
Read 2 more answers
A utility company hires pollsters to knock on random doors in different parts of town to survey residents about the
exis [7]

Answer:

B: Yes, it is biased. Some of the residents who are surveyed may not want to respond to someone who knocks at their door.

Step-by-step explanation: Just took a quiz and past. Edge2020

4 0
3 years ago
Read 2 more answers
Below, the two-way table is given for a class of students. Juniors Seniors Free Freshmen Sophomore Male 4 6 2 2. Female 3 4 6 3
77julia77 [94]

Answer:

Pr = 7\%

Step-by-step explanation:

Given

See attachment for graph

Required

Find P(Junior|Male)

To do this, we first calculate the total students.

Total = 4 + 6 + 2 + 2 + 3 + 4 + 6 + 3

Total = 30

Next, select the value in the cell that intersects Male and Junior

Male\ and\ Junior = 2

Hence, the probability is

Pr = \frac{Male\ and\ Junior}{Total}

Pr = \frac{2}{30}

Pr = 0.067

Express as percentage

Pr = 0.067*100\%

Pr = 6.7\%

Approximate

Pr = 7\%

5 0
3 years ago
Read 2 more answers
What is the slope of the graph of 2x – 6y = 9?
notsponge [240]
Let's make our equation in the form of y = mx + b

<span> 2x – 6y = 9

Add 6y on both sides

2x = 6y + 9

Subtract 9 on both sides

6y = 2x - 9

Divide 6 on both sides

y = 1/3 - 3/2

Now, we have it in the form of y = mx + b

In y = mx + b, m is the slope and b is the y-intercept

That means in y = 1/3 - 3/2, the slope is A) 1/3.

Your answer is A) 1/3</span>
5 0
3 years ago
Read 2 more answers
Other questions:
  • Use long division to convert the rational number 5/7 to its equivalent decimal form. In your final answer, include all of your w
    12·1 answer
  • Geometry Angle Problem
    5·1 answer
  • Help plz!!!<br> similiar triangles
    5·1 answer
  • What are the x-intercept and y-intercept of the graph of y = 1/3x − 6
    14·1 answer
  • Which of the following symbol make(s) the following mathematical statement true?
    14·2 answers
  • 2x+3y=0 does it repersent a direct variation if it does whats the constant
    15·1 answer
  • Solve 2x^2 + 16x + 50 = 0.
    5·1 answer
  • 5 peas equals 1 pod. 4 pods equals 1/2 ping. 3 pings equals how many peas? Please give me the full explanation so I can know for
    8·1 answer
  • ANSWER THE IMAGINE ABOVE, TYYSM&lt;3​
    13·1 answer
  • John is pushing his car. He can push it .5 miles per hour. How long will it take him to push his car 1.5 miles?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!