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In-s [12.5K]
3 years ago
7

48% of the students in the class play sports. 12 students in the class play sports , how many students are in the class?

Mathematics
2 answers:
Setler [38]3 years ago
3 0
The answer is 25 students.
Novay_Z [31]3 years ago
3 0
This problem is quite difficult if you don't remember a technique to solving it.
I will help teach you this tactic.
First, set the percentage over 100, which is 48/100 as a fraction (which is what "over 100" means).
Now, put 12 over x, which is the total amount of students in the class. It should look like this: 12/x.
Now that we've done this, set them up as a proportion.
Your proportion should be:
12/x = 48/100
This is where it becomes a little confusing if you do not remember this correctly.
Cross multiply the denominator (the bottom number of a fraction) of 12/x by the numerator (the top number of a fraction) of 48/100.
This number should be:
48x.
Now, cross multiply the denominator of 48/100 by the numerator of 12/x.
This number should be:
1200.
Our equation now is:
48x = 1200.
To solve for this, divide both sides by 48 to solve for x.
48x / 48 = x
1200 / 48 = 25.
Your equation and solved problem is:
There are 25 total students.
I hope this taught you something and I hope it's very helpful!
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Parallel to y=−3/4x, through (4, -1)
kolbaska11 [484]

Answer:

y=-\frac{3}{4}x+2

Step-by-step explanation:

The slope-intercept form is given by y=mx+c, where m is the slope and c is the y-intercept.

Slope of given line= -\frac{3}{4}

Parallel lines have the same slope. Thus, the slope of the line would also be -\frac{3}{4}.

y=-\frac{3}{4}x +c

The value of c can be found by substituting a pair of coordinates.

When x= 4, y= -1,

-1=-\frac{3}{4} (4)+c

-1= -3 +c

<em>Add 3 to both sides:</em>

c= -1 +3

c= 2

Thus, the equation of the line is \bf{y=-\frac{3}{4}x+2.

Additional:

Do check out the following for a similar question on slope-intercept form!

  • brainly.com/question/25549430
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