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3 years ago

Find the quotient 3/18 divided by 7/21

2 answers:

6 0

Lets reduce the fractions first...
3/18 = 1/6
7/21 = 1/3

(1/6) / (1/3)...when dividing fractions, flip what u r dividing by, then multiply
1/6 * 3 = 3/6 reduces to 1/2

igor_vitrenko [27]3 years ago

3 0

This is the same as 3/18 x 21/7, which you can simplify to 1/6 x 3, which is 3/6 also a half. So the answer is 1/2

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I need help with this one pls!

Alex73 [517]

Hi there!

$\large\boxed{b = \frac{a}{ac - 1}}$

We can begin by making each fraction have a common denominator:

If we make each have a common denominator of ab, we get:

$\frac{b}{ab} + \frac{a}{ab} = c$

Simplify:

$\frac{a + b}{ab} = c$

Multiply both sides by ab:

$a + b = cab$

Move b to the opposite side:

$a = cab - b$

Factor out b:

$a = b(ac - 1)$

Divide by (ac - 1):

$\frac{a}{ac - 1} = b$

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3 years ago

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3 years ago

Assume that REM sleep time is normally distributed for both children and adults. A random sample of n1 = 9 children (9 years old

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3 years ago

the sum of the three number is 92. the third is 3 times the first, the first number is 7 less than the second. what are the numb

vichka [17]

Let x represent the first number, y represent the second, and z represent the third.

x + y + z = 92
z = 3x
x = y - 7

Solve x = y - 7 for y.
x = y - 7
x + 7 = y

Fill in y and z so that we only have to worry about x for now.

x + y + z = 92
x + (x + 7) + (3x) = 92
x + x + 7 + 3x = 92
5x + 7 = 92
5x = 92 - 7
5x = 85
x = 85/5
x = 17

Solve for y.
y = x + 7
y = (17) + 7
y = 24

Solve for z.
z = 3x
z = 3(17)
z = 51

So x = 17, y = 24, and z = 51.

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3 years ago