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
Bond [772]
3 years ago
12

A swimming class has 20 students. Only 8 students know how to dive off

Mathematics
1 answer:
Allisa [31]3 years ago
6 0

Answer: 40%  

Step-by-step explanation:

To write 8/20 as a percent have to remember that 1 equal 100% and that what you need to do is just to multiply the number by 100 and add at the end symbol % . 8/20 * 100 = 0.4 * 100 = 40% And finally we have: 8/20 as a percent equals 40%

You might be interested in
Clark made four of his truck payments late and was fined four late fees. The total change to his savings from late fees was-$40.
luda_lava [24]
You would do 40 ÷ 4 which would be 10. so it was $10 per late fee
3 0
3 years ago
Determine whether the slope line is positive or negative and then find the slope of each line?
goldenfox [79]
I he slope line is negative
5 0
3 years ago
X/2 = Y/3 = Z/4. prove that :2X-Y+5Z / 3Y-X =3. note :: (/) is for a fraction aka divide. help pls I've been stuck on it for a f
sweet-ann [11.9K]

The given equation

x/2 = y/3 = z/4

can be broken into three separate equations which I'll call equations (A), (B) and (C)

  • x/2 = y/3 ..... equation (A)
  • y/3 = z/4 .... equation (B)
  • x/2 = z/4 .... equation (C)

We'll start off solving for z in equation (C)

x/2 = z/4

4x = 2z ... cross multiply

2z = 4x

z = 4x/2 ... divide both sides by 2

z = 2x

Now let's solve for y in equation (A)

x/2 = y/3

3x = 2y

2y = 3x

y = 3x/2

y = (3/2)x

y = 1.5x

The results of z = 2x and y = 1.5x both have the right hand sides in terms of x. This will allow us to replace the variables y and z with something in terms of x, which means we'll have some overall expression with x only. The idea is that expression should simplify to 3 if we played our cards right.

We won't be using equation (B) at all.

---------------------

The key takeaway from the last section is that

  • z = 2x
  • y = 1.5x

Let's plug those items into the expression (2x-y+5z)/(3y-x) to get the following:

(2x-y+5z)/(3y-x)

(2x-y+5(2x))/(3y-x) ..... plug in z = 2x

(2x-y+10x)/(3y-x)

(12x-y)/(3y-x)

(12x-1.5x)/(3(1.5x)-x) .... plug in y = 1.5x

(12x-1.5x)/(4.5x-x)

(10.5x)/(3.5x)

(10.5)/(3.5)

3

We've shown that plugging z = 2x and y = 1.5x into the expression above simplifies to 3. Therefore, the equation (2x-y+5z)/(3y-x) = 3 is true when x/2 = y/3 = z/4. This concludes the proof.

5 0
2 years ago
The ratio of boys to girls in a summer camp is 2 to 3. how many boys and girls are there if the camp has 350 students?
borishaifa [10]
2 times 25 equals 50. 3 times 100 is 300. 50+300=350
6 0
2 years ago
Guys help
RideAnS [48]

Step-by-step explanation:

(-23) x 93 = - 2139

(- 16 ) x (- 30) = 480

14 x (- 12) = - 168

8 0
3 years ago
Read 2 more answers
Other questions:
  • in a survey, 27% of people chose salads over a meat dish. In all, 81 people chose salads. How many people were in the survey?
    7·2 answers
  • Sonya has $40 in her lunch account and pays $2 each
    10·1 answer
  • The number 0.4 can be written as 4/10 so it’s a rational number, true or false
    8·2 answers
  • Help help help!!! I don't know how to do it!!!
    10·2 answers
  • Help me pleaseee. Beth and Jacob are graph two equations on a coordinate grid. Beth has graphed the equation y= x^2 + 1 as shown
    5·1 answer
  • Solve for x <br> 37 points for answer :)
    10·1 answer
  • Classify the following triangle as Acute, Obtuse , or right
    7·1 answer
  • Simplify 5a×3×2b<br><br> Write down the answer, please.
    7·1 answer
  • It takes a car 2.5 h to go from mile marker 15 to mile marker 130. What is the average speed of the car?
    7·2 answers
  • Please help with my math question! :))
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!