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2 years ago

In 1-3 sentences, explain how we know that the the volume of a pyramid is V=1/3Bh

Mathematics

1 answer:

sergij07 [2.7K]2 years ago

8 0

Answer:

The formula for finding the volume of a pyramid is V= lwh/3. Taking this into consideration, the length times the width times the height must be one, so we put that over three.

Step-by-step explanation:

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I don’t understand how to do this

schepotkina [342]

Answer:

The solution is $x =0.$

Step-by-step explanation:

The equation

$\bold{(1).}\: sin(\dfrac{3\pi }{2} +x)+sin(\dfrac{3\pi }{2} +x) =-2$

can be rewritten as

$2* sin(\dfrac{3\pi }{2} +2) =-2$

and can be further simplified to

$sin(\dfrac{3\pi }{2}+x ) =-1$ .

Now, taking the inverse sine of both sides we get:

$sin^{-1}(sin(\dfrac{3\pi }{2} +x) =sin^{-1}(-1)$

$\bold{(2).}\: \dfrac{3\pi }{2} +2 =sin^{-1}(-1)$

The value of the right side on the interval $[0,2\pi)$ is

$sin^{-1}(-1) = \dfrac{3\pi}{2} \: \:( \text{or }270^o)$ ,

which makes the equation (2)

$\dfrac{3\pi }{2}+x =\dfrac{3\pi}{2}$

solving for $x$ gives

$\boxed{x = 0}$

which is our solution.

4 0

3 years ago

Someone help me please!

Natasha_Volkova [10]

Answer:

y < -3x + 2

Step-by-step explanation:

The shading is below the line meaning the inequality is less than. Moreover, the line is dashed meaning there is no 'equal to'.

Therefore, the inequality is y < -3x + 2.

5 0

2 years ago

The original price of a shirt is increased by $15. Patrick buys two of the shirts. The total price before sales tax is added is

kotegsom [21]

1. 86/2=43/new price of one shirt
2. 43-15=28/original price of one shirt

Your answer would be $28.

8 0

2 years ago

Read 2 more answers

If the circumference of a circle is 42 feet. what is the radius of the circle

Setler [38]

Answer:

radius = 21

Step-by-step explanation:

7 0

3 years ago

Mr. Hann is trying to decide how many new copies of a book to order for his students. Each book weighs 6ounces

Nina [5.8K]

Answer:

I’m afraid I can’t help you. The question makes no sense because the question doesn’t explain how many students there are. It just gives the weight of the books which I assume is useless

Step-by-step explanation:

3 0

2 years ago