Answer:
Step-by-step explanation:
Note that √2x = √2*√x, and so we have √2*√x + 13 = √x + 31.
First subtract 13 from both sides, obtaining: √2*√x = √x + 18.
Next, group the √x terms together: √2*√x - √x = 18.
Now solve this for √x. We get:
√x(√2 - 1) = 18, or
18
√x = --------------
(√2 - 1)
To find x, square both sides:
18^2
x = ---------------
(√2 - 1)^2
The answer is 7, 7 cds were purchased, hope this helps have a great day!
B and c
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395/1000 will reduce down too 79/200
Answer:
It is called this
Step-by-step explanation:
Since the three points are all on the same line, they are called collinear points.