Answer:
Ratio = 6 : 5
Step-by-step explanation:
Total number of boys = 30
Total number of girls = 25
Ratio of boys and girls = 30 : 25
= 6 : 5
The answer is: " 20 items " .
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60% of x = 12. Solve for x.
60% = 60/100 = 6/10 = 3/5 = 0.6 .
(3/5)x = 12 ;
Multiply each side of the equation by "5" :
5* (3/5)x = 12 * 5 ;
3x = 60 ;
Divide each side of the equation by "3" ;
3x/ 3 = 60 / 3 ;
to get:
x = 20.
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The answer is: " 20 items " .
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First, find the <em>least common denominator</em> (the denominator that can be able to equal to other denominators).
[tex]4[tex] [tex]\frac{1}{3}[tex]
[tex]4[tex] [tex]\frac{5}{15}[tex]
Then, subtract.
[tex]4[tex] [tex]\frac{5}{15}[tex] [tex]-[tex] [tex]1[tex] [tex]\frac{7}{15}[tex]
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= [tex]2[tex] [tex]\frac{13}{15}[tex]
The sequence 1, 3, 6, 10, 15, etc find dy/dx...
dy/dx=2,3,4,5 this is not a constant so find d2y/dx2
d2y/dx2=1,1,1, this is a constant, specifically a constant acceleration, which is a property of a quadratic function of the form ax^2+bx+c and if we use three points of the sequence we can solve for all of the variables...
9a+3b+c=6
4a+2b+c=3
a+b+c=1 getting differences
5a+b=3
3a+b=2 and again
2a=1, so a=1/2, making 3a+b=2 become:
1.5+b=2, so b=1/2, making a+b+c=1 become
1/2+1/2+c=1 so c=0 so our function is:
a(n)=(n^2+n)/2
which can be expressed, if you factor the numerator as:
a(n)=n(n-1)/2
Option 1: C= 10 L + 200. Option 2: C= 50 L .