1.6.PS-20

Mathematics

1 answer:

forsale [732]3 years ago

3 0

The answer is 44 and if he deposits it is 33 dollars:

11x4

1x4=4

So 11x4=44

And if he deposits 11 he will have 33

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A Play 3) What is the mean of the data set? 8, 16, 9, 11

konstantin123 [22]

The answer is 11 when you add everything up it makes 44 divided by how many numbers there are so 44/4=11

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Pls help soon:)

Kobotan [32]

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svetlana [45]

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3 years ago

what is the solution of sqrt(2x+4)-sqrt(x)=2 A. x = 0 B. x = 0 and x = 16 C. x = 0 and x = –16 D. x = 16 and x = –16

Charra [1.4K]

We want to solve
√(2x+4) - √(x) = 2

Write equation as
√(2x+4) = √x + 2
Square each side.
2x + 4 = x + 4√x + 4
x = 4√x
x - 4√x = 0
√x (√x - 4) = 0

Either
√x = 0 => x = 0
or
√x = 4 => x = 16

Test for extraneous solutions.
When x = 0:
√(2x+4) - √x = 2 (Correct)
When x = 16:
√(2x+4) - √x = √(36) - √(16) = 6 - 4 = 2 (Correct)

A plot of f(x) = √(2x+4) - √x - 2 = 0 confirms hat the solutions are correct.

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natali 33 [55]

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