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
faltersainse [42]
2 years ago
5

In a class 20 of students, 7 have a cat and

Mathematics
1 answer:
blsea [12.9K]2 years ago
8 0

Answer:

\frac{3}{20}

Step-by-step explanation:

Since there are 20 students, this will be the denominator.

Now, to find how many students have a dog and a cat, you need to subtract all the numbers with 20. The leftover number will be the amount of students.

7+8+8=23

23-20=3

So, there are 3 students who have a dog and a cat.

So, the fraction will be \frac{3}{20}

You might be interested in
3/4 + 3/9 how do i do this
Artist 52 [7]

Answer:

13/12

Step-by-step explanation:

Well, you can't add it yet because the denominators don't match. We can't subtract two fractions with different denominators. So you need to get a common denominator. To do this, you'll multiply the denominators times each other... but the numerators have to change as well. So, multiply 3 by 8, and get 24. Since 4 is evenly divided by 8, we can multiply just one term to get a common denominator. Multiply 3 by 2, and get 6, then we multiply 4 by 2 and get 8. Since our denominators match, we can add the numerators. So now your answer should be 9/8.  Well guess what... IT IS THE ANSWER! You can't reduce it anymore so 9/8 is your answer! Hope this helped!

7 0
3 years ago
I need the answers please help 60points
enyata [817]
In 22, you're looking for the vertical height of the triangle. You're given the angle opposite the side you want to find (which I'll call x) and the length of the hypotenuse. This sets you up with the relation

\sin2^\circ=\dfrac x{1600}\implies x\approx55.84\text{ m}

In 23, you're given a similar situation, except now you're looking for the angle (I'll call it \theta) in the triangle opposite the side denoting the height of the airplane. So this time,

\sin\theta=\dfrac{1500}{5000}=\dfrac3{10}\implies\theta=\arcsin\dfrac3{10}\approx17.46^\circ
6 0
2 years ago
Read 2 more answers
-5(x+1)+3x=6-(4x-3) solve for x
PilotLPTM [1.2K]

Answer: x = -3

Step-by-step explanation:Step by step solution :

Step  1  :

Pulling out like terms :

1.1     Pull out like factors :

  -x - 3  =   -1 • (x + 3)  

Equation at the end of step  1  :

Step  2  :

Solving a Single Variable Equation :

2.1      Solve  :    -x-3 = 0  

Add  3  to both sides of the equation :  

                     -x = 3  

Multiply both sides of the equation by (-1) :  x = -3  

One solution was found :

                  x = -3

7 0
3 years ago
Solve for L <br> 10LW=V<br><br> i need help answering this question
vlabodo [156]
10LW=V

L/10W= V/10W

L= V/10W
3 0
3 years ago
According to a survey conducted by Deloitte in 2017, 0.4702 of U.S. smartphone owners have made an effort to limit their phone u
musickatia [10]

Answer: 0.628

Step-by-step explanation:

Probability of U.S. smartphone owners have made an effort to limit their phone use in the past : p = 0.4702

Sample size : n= 54

Mean : \mu =(54)(0.4702)=25.39

Standard deviation:

\sigma=\sqrt{(54)(0.4702)}=\sqrt{25.39}\\\\\approx5.039

The probability that between 22 and 29 (inclusively) will have attempted to limit their cell phone use in the past will be :

P(22\leq x\leq29)=P(21

Hence, the required probability = 0.628

5 0
3 years ago
Other questions:
  • For two events, M and N, P(M)=0.7, P(N|M)=0.3, and P(M'|N')
    6·1 answer
  • If an experiment fails to disprove a hypothesis, then __________.
    14·1 answer
  • What ia the common ratio of the sequence? -2 , 6, -18, 54,...
    7·1 answer
  • Adding unlike fractions<br><br> 1/15+38/100
    5·1 answer
  • I will ive brainliest answer
    10·2 answers
  • AGHHH H SOMEONE PLEASE HELP ME TYSM
    9·2 answers
  • Carson bought two loaves of bread and one dozen eggs at the grocery store yesterday he paid a total of $6.09.If one dozen of egg
    9·2 answers
  • What is the mean number of cakes jenny bakes in a month
    8·2 answers
  • Qual é o perímetro de um quadrado de 3,8 cm de lado ?E sua área?
    9·1 answer
  • NEED HELP ASAP I WILL MARK YOU BRAINLIST
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!