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
DaniilM [7]
3 years ago
9

Determine whether the number is rational or irrational: -21*

Mathematics
1 answer:
timofeeve [1]3 years ago
6 0

Answer:

Rational

Step-by-step explanation:

Pi is a rational number

You might be interested in
Please Help Brain list and 25 Points whoever gets it right. You have to have a actual explanation and a real answer. Not just B,
den301095 [7]

Answer: B

Step-by-step explanation:

9/6 divided by 3/2

you flip 3/2 to 2/3 and multiply

9/6 times 2/3 = 1

3 0
3 years ago
What is 12 3/5 divided 2 1/10?
raketka [301]

Answer:

The answer is six

Step-by-step explanation:

12 3/5 = 63/5

2 1/10 = 21/10

63/5 divided by 21/10 is equal to 63/5 multiplied by 10/21 which is equal to 630/105 = 6 <-- answer

7 0
3 years ago
The equation $y=-4.9t^2+3.5t+5$ describes the height (in meters) of a ball thrown upward at $3.5$ meters per second from $5$ met
Georgia [21]

Answer:

Step-by-step explanation:

The position function is

s(t)=-4.9t^2+3.5t+5 and if we are looking for the time t it takes for the ball to hit the ground, we are looking for the height of the ball when it is on the ground. Of course the height of anything on the ground is 0, so if we set s(t) = 0 and solve for t, we will find our answer.

0=-4.9t^2+3.5t+5 and factor that however you are currently factoring in class to get that

t = -.71428 seconds or

t = 1.42857 seconds (neither one of those is rational so they can't be expressed as fractions).

We all know that time will never be a negative value, so the time it takes this ball to hit the ground is

1.42857 seconds (round how you need to).

4 0
3 years ago
A hair dryer has a resistance of 11. 5. What current does it conduct when it is plugged into a wall outlet that provides 120 V?
Nata [24]

The current it conduct when it is plugged into a wall outlet that provides 120 V is 10.4A

<h3>Ohms law</h3>

The current passing through a conductor is proportional to the potential difference. Mathematically;

V = IR
where
V is the voltage = 120V

R is the resistance = 11.5 ohms

Required

Current I

Substitute

I = V/R
I = 120/11.5
I = 10.4A

Hence  the current it conduct when it is plugged into a wall outlet that provides 120 V is 10.4A

Learn more on ohms law here:brainly.com/question/14296509

#SPJ1

6 0
2 years ago
Find x and round to the nearest tenth:)
Thepotemich [5.8K]

Answer:

x = 31.8°

Step-by-step explanation:

Applying the Law of Sines, we have:

\frac{sin(x)}{12} = \frac{sin(75)}{22}

Multiply both sides by 12

\frac{sin(x)}{12} \times 12 = \frac{sin(75)}{22} \times 12

sin(x) = \frac{sin(75) \times 12}{22}

sin(x) = 0.5269

x = sin^{-1}(0.5269)

x = 31.8° (nearest tenth)

8 0
3 years ago
Other questions:
  • (50 points + Brainliest for RIGHT answer).
    14·2 answers
  • SOMEONE PLEASE HELP ME WITH THIS MATH IM STRUGGLING!
    9·1 answer
  • Divide 36xy-39y over 3y
    13·2 answers
  • The question <br> Najheheggebbsbv nhsygenbs
    14·1 answer
  • 26 ÷ -6<br><br>as a mixed number and simplified ​
    5·2 answers
  • Covert 120 miles per hour to feet per second
    8·2 answers
  • Is 7,434 divisible by 6 true are false
    5·1 answer
  • During a certain 11-year period, the Consumer Price Index (CPI) increased by
    12·1 answer
  • Suppose you are choosing between checking account A, which charges a $7.50 monthly fee, $1 per check, and $2 per ATM visit; and
    13·1 answer
  • For Question #1, use the graphs of f(x) and g(x) to evaluate go f (4).
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!