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3 years ago

Plzzzzzzzzzzzzzzzzz help

Mathematics

1 answer:

Tanya [424]3 years ago

6 0

Yes $=16xDays
Its directly proportional

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On Labor Day, Ross and his brothers went fishing to the Chaumont River, Ross took home 15

TEA [102]

Answer:

20 fish

Step-by-step explanation:

3/4 of 20 is 15

6 0

3 years ago

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Which solid figure does this net represent?

Gnom [1K]

Answer: C) rectangular prism

Step-by-step explanation:

8 0

4 years ago

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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;

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

$\frac{dy}{dx} = \frac{-1}{sin y} \\\\from\ trigonometry\ identity,\ sin^{2} x+cos^{2}x = 1\\sinx = \sqrt{1-cos^{2} x}$

Therefore;

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

Since x = cos y from the above substitute;

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

Hence, $\frac{d(cos^{-1}x )}{dx} = \frac{-1}{\sqrt{1-x^2} }$ gives the required proof

5 0

4 years ago

400$ is fivided between kas, jaspar, and jae so that kas has twice as much as jaspar and jaspar has three times as much as jae.

Fynjy0 [20]

Let jae have x dollars. Thus, we can make the equation:-

x + 3x + 2*(3x) = 400

4x + 6x = 400

10x = 400

x = 40

So jae has $40 and

jaspar has 3x = 3* 40

= $120 dollars (answer

6 0

3 years ago

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Find the area of the shaded region!<br>please solve this with solutions !ASAP

bija089 [108]

the area of the shaded part is 30. 89 cm²

<h3>How to determine the area</h3>

We have the shape to be a rectangle

The area of the shaded part should be;

Area of rectangle - 2 ( area of a semi circle)

The formula for area of a rectangle

Area = length × width

Area = 12 × 12

Area = 144 cm²

Area of a semicircle = 1/2 πr²

Area = 1/ 2 × 3. 142 × 6²

Area = 56. 56 cm²

Area of shaded part = area of rectangle - 2( area of semicircle)

Area of shaded part = 144 - 2(56. 56)

Area of shaded part = 144 - 113. 11

Area of shaded part = 30. 89 cm²

Thus, the area of the shaded part is 30. 89 cm²

Learn more about area here:

brainly.com/question/14137384

#SPJ1

3 0

2 years ago