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3 years ago

Peters mom gave him a $10 bill he purchased a magazine for $4.50 and the tax was 6% how much change did peter get

Mathematics

1 answer:

never [62]3 years ago

7 0

Answer:

$5.50

Step-by-step explanation:

10 - 4.50 = 5.50

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Answer:

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Step-by-step explanation:

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3 years ago

Is 3,4,5 a Pythagorean triple

son4ous [18]

Answer:

Yes because it fits the Pythagorean Theorem

Step-by-step explanation:

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3 years ago

Prove the formula for (d/dx)(cos−1(x)) by the same method as for (d/dx)(sin−1(x)). Let y = cos−1(x). Then cos(y) = and 0 ≤ y ≤ π

gtnhenbr [62]

Answer:

$\frac{d(cos^{-1}x )}{dx} = \frac{-1}{\sqrt{1-x^2} }$

Step-by-step explanation:

Given the differential (d/dx)(cos−1(x)), to find the equivalent formula we will differentiate the inverse function using chain rule as shown below;

let;

$y = cos^{-1} x \\\\taking \ cos\ of\ both\ sides\\\\cosy = cos(cos^{-1} x)\\\\cosy = x\\\\x = cosy\\\\\frac{dx}{dy} = -siny\\$

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Therefore;

$\frac{dy}{dx} = \frac{-1}{\sqrt{1-cos^{2}y } }$

Since x = cos y from the above substitute;

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4 years ago

A number increase by 7 is greater than 30

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Answer:

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Step-by-step explanation:

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3 years ago

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USPshnik [31]

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4 years ago

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