20,000 is 1/10 of what?

1 answer:

4 0

I was taught a formula for this in seven grade.

I set it up like this

$20,000/n = 1/10$

you use the cross multiply rule.

so..

20,000 × 10 = 200,000

n × 1 = 1n

now your left with

200,000/1n

200,000 divided by 1 is 200,000

so n = 200,000

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If you find this hard to be leave try it with a square.
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The area of a right triangle is sixty square centimetres. Its base is one centimetre less than twice its height. If the base and

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Answer:

5. None of the above

Step-by-step explanation:

We have this information:

A = 60 cm2

b = 2*h - 1

Let's find out b and h:

The equation of the are of a triangle is A = (b*h)/2, if we replace it with our information, we have

$60 = ((2*h - 1) * h)/2\\ 120 = 2*h^2 - h\\ 0 = 2*h^2 - h - 120$

Let's find h with the quadratic formula:

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h = 8 or h = -7.5

But h represents the height of the triangle, so it has to be a positive number, that's h = 8.

If we replace this in the equation we had for b, we have that b = 2*8 - 1 = 15.

Now we can calculate the hypotenuse with the Pythagorean equation

$\fbox {Pythagorean equation:}$ <em>The square of the length of the hypotenuse (the side opposite the right angle) of a right triangle is equal to the sum of the squares of the two legs (the two sides that meet at a right angle). </em>