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Dimas [21]
3 years ago
10

What is the value of x in the equation 3x - 1/9y = 18, when y = 27?

Mathematics
2 answers:
zubka84 [21]3 years ago
8 0

Answer:

x=7

Step-by-step explanation:

prisoha [69]3 years ago
6 0

Answer:

x = 7

Step-by-step explanation:

3x - (1/9)y = 18

*subsitute y as 27, because they are equal to each other*

3x - (1/9)(27) = 18

*multiply and simplify)

3x - (27/9) = 18

*isolate x*

3x - 3 = 18

3x = 21

<u>x = 7</u>

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Point B ∈ AC. Find the length of segments AB and BC if AC = 20 cm and: AB:BC = 3:7
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Answer:

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Step-by-step explanation:

Here, B is a point on a segment AC.

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Now, let the common ratio between the segment is x.

So, the length of AB = 3 x , and Length of BC = 7 x

Now, AB + BC = AC

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or, 10 x = 20

or, x = 2

Hence, the length of AB = 3 x = 3 x 2 = 6 cm

and the length of the segment BC = 7x =  7 x 2 =  14 cm

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