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dybincka [34]
3 years ago
10

if 60% of the students in math club or boys and if there’s 12 girls in the club then how many students are in the club

Mathematics
1 answer:
nekit [7.7K]3 years ago
8 0

Answer:

30

Step-by-step explanation:

100-60=40. This means that 40% of the students are girls (Assuming there is no ppl that identify as anything else). If that 40% is 12 ppl, 10% in 12/4=3. 3*10=30, there are 30 ppl in the club.

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a rectangular block is such that the sides of its base are of the length x cm and 3x cm. The sum of all the lengths of all its e
Xelga [282]

Answer:

15x^2 - 12x^3

Step-by-step explanation:

A rectangular block has 3 parts that play into its volume.  length, width and height.  The question gives us length and width in the form of x and 3x, so height is what's missing.

It gives us a bit more information saying the sum of its edges is 20.  We also have to ask how many lengths, widths and heights are there.  That may be a bit hard to understand, but  is you are looking at a block I could ask how many edges are vertical, just going up and down.  These would be the heights.  There are 4 total, and this goes the same for length and width, so 4*length + 4*width and 4*height = 20.  

Taking that and plugging in x for length and 3x for width (or you could do it the other way around, it doesn't matter, you get:

4*x + 4*3x + 4*height = 20

4x + 12x + 4h = 20

16x + 4h = 20

4h = 20 - 16x

h = 5 - 4x

Now we have h in terms of x, which lets us easily find the volume just knowing x.  To find the volume of a rectangular block you just multiply the length, width and height.

x*3x*(5-4x)

3x^2(5-4x)

15x^2 - 12x^3

Question doesn't give a specific value for x at all so you should be done there.  Any number you plug in for x should get you the right answer

5 0
3 years ago
Add. 56+234 Enter the sum in the box as a mixed number in the simplest form.
Kobotan [32]

Answer:

290

Step-by-step explanation:

First, add two digit number from them.

50 + 30 = 80

Second, add the last two numbers.

6 + 4 = 10

So, add these two results.

80 + 10 = 90

Final, all of theses results are added to three digit number of second number.

So, final result is

200 + 90 = 290

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3 years ago
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Step-by-step explanation:

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3 years ago
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never [62]

Answer:

The answer to the promblem is -7

4 0
3 years ago
what is 1/8 times 20, what is 4/5 times 3/8, what is 1 1/8 times 1/9, what is 3/4 times 1/3 times 2/5, all must be simplified pl
bezimeni [28]
I hope this helps you


1/8.20=2,5

4/5.3/8=12/40=0,3

1 1/8=9/8 9/8.1/9=1/8=0,125

3/4.1/3.2/5=1/10=0,1
4 0
3 years ago
Read 2 more answers
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