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2 years ago

I need help with that, if you can, plz. I ty it I think is a not sure

Mathematics

1 answer:

STALIN [3.7K]2 years ago

5 0

Answer:

-5≤x <1

Step-by-step explanation:

sqrt( x+5) / sqrt(1-x)

The numerator must be greater than zero since it is a square root

sqrt(x+5) ≥0

Square each side

x+5≥0

x≥-5

The denominator must be greater than zero (the denominator cannot be zero)

sqrt(1-x)> 0

Square each side

1-x > 0

1>x

Putting these together

-5≤x <1

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2 years ago

You design a new app for cell phones. Your revenue for x downloads is given by f(x) = 3x Your profit

Snowcat [4.5K]

Answer:

p = 2.7x - 20

p(90) = $223

Step-by-step explanation:

revenue → f(x) = 3x ,where x is the number of downloads.

the statement “Your profit p is $20 less than 90% of the revenue for x downloads”

means

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1 year ago

Solve the equation -3x + 1 + 10x = x + 4 0 x = 1/2 х = x = 12 X = 18

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Answer:

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-3x + 1 + 10x = x + 4

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2 years ago

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Answer:

We have sinθ = 12/13

The method here is to figure out the value of θ

Using a calculator sin^(-1)(12/13) =67.38°

67.38° is in quadrant 1 so we must substract 67.38° from 180° wich is π

180-67.38= 112.61° ⇒ θ= 112.61°

Now time to calculate cos2θ and cosθ using a calculator

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The values we got make sense since θ is in quadrant 2 and 2θ in quadrant 3

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2 years ago