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3 years ago

Please, be quick!

Mathematics

1 answer:

Marina CMI [18]3 years ago

7 0

Answer:

It is the square (I'm assuming that one is D)

Step-by-step explanation:

Note that it specifically states that it is a "square pyramid". This means that the base is a square, and the other 4 sides create the pyramid.

Also note that the cross-section cuts by a plane "parallel to the base", suggesting that it will have the same shape as the base.

Since the base is a square, ∴ the plane cross-section will also be a square.

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How do u do this find the recipesent of 3/4 plz help and thanks

Mila [183]

To make the reciprocal of a fraction, swap the numerator and denominator.

The reciprocal of 3/4 is 4/3.

_____

To make the reciprocal of an integer, write it as a fraction, then proceed as above. Example: (reciprocal of 2) = (reciprocal of 2/1) is 1/2.

Not surprisingly, the reciprocal of a number x is written 1/x.

8 0

2 years ago

X6=729.help find out whats the x

tamaranim1 [39]

Answer:

x = 121.5

Step-by-step explanation:

Write it out: 6x = 729
Divide each side by 6 to cancel out the 6 next to x. It should now look like this: x = 121.5

6 0

2 years ago

Read 2 more answers

Express the situation as a system of two equations in two variables. Be sure to state clearly the meaning of your x- and y-varia

expeople1 [14]

Answer:

9 TV ads and 20 radio ads

Step-by-step explanation:

He has $37,000 to spend. He has to sum that amount of money between the TV and radio ads. Each TV ad costs $3000 while each radio ad costs $500, so the equation that represents that is 37000 = 3000x + 500y

The same happens with the amount of voters he needs to reach, the equation is 130000 = 10000x + 2000y

The system that represents this is

$\left \{ {{3000x+500y=37000} \atop {10000x+2000y=130000}} \right.$

And the augmented matrix is

$\left[\begin{array}{cc|c}3000&500&37000\\10000&2000&130000\end{array}\right]$

First we divide the first row by 3000 and the second by 10000:

$\left[\begin{array}{cc|c}1&1/6&37/3\\1&1/5&13\end{array}\right]$

Then we multiply the second row by (-1) and we add the first row:

$\left[\begin{array}{cc|c}1&1/6&37/3\\0&-1/30&-2/3\end{array}\right]$

Now we multiply the second row by -30:

$\left[\begin{array}{cc|c}1&1/6&37/3\\0&1&20\end{array}\right]$

Finally, to the first row we add the second one multiply by (-1/6):

$\left[\begin{array}{cc|c}1&0&9\\0&1&20\end{array}\right]$

So, x = 9 and y = 20

That means 9 TV and 20 radio ads will contact 130,000 voters using the allocated funds

3 0

3 years ago

How many time zones are there in Antarctica?

jonny [76]

I think there are 3 time zones

3 0

3 years ago

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Total cost after tax to repair Deborah’s computer is represented by 0.08(50h) +50h where h represents the number of hours it tak

Stella [2.4K]

The tax most likely is represented by 0.08(50h), as it is the smallest amount of the expression.

50h will result in a much larger number, which is probably the actual service fee.

5 0

3 years ago

Read 2 more answers