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elena-14-01-66 [18.8K]
3 years ago
9

I solved the problem but I'm not sure if I got it right so can you guys help me with it?

Mathematics
1 answer:
Lerok [7]3 years ago
6 0
Sure buddy! -4/9 + 1/2 is 1/8 in exact form. In decimal form it is 0.05 (bar notation over 5) 
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A student claims that the rectangular point below can be represented by the
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Since we don't have a figure we'll assume one of them is right and we're just being asked to check if they're the same number.  I like writing polar coordinates with a P in front to remind me.

It's surely false if that's really a 3π/7; I'll guess that's a typo that's really 3π/4.

P(6√2, 7π/4) = ( 6√2 cos 7π/4, 6√2 sin 7π/4 )

P(-6√2, 3π/4) = ( -6√2 cos 3π/4, -6√2 sin 3π/4 )

That's true since when we add pi to an angle it negates both the sine and the cosine,

cos(7π/4) = cos(π + 3π/4) = -cos(3π/4)

sin(7π/4) = sin(π + 3π/4) = -sin(3π/4)

Answer: TRUE

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3 years ago
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4 years ago
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Liquid Tylenol has 325 milligrams of acetaminophen per 12.5 milliliters of liquid medicine (a fact that would be commonly abbrev
gulaghasi [49]

Answer:

10 milliliters

Step-by-step explanation:

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A circular plate has a diameter of 10 inches. What is the distance around the plate?
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Step-by-step explanation:

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Ramon is making book shelves. He bought a board that is 4/5 meter long. He needs 5 shelves. If he cuts 5 equal-sized pieces from
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Answer:

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Step-by-step explanation:

The board is 4/5 meters long, and he needs to cut 5 equal pieces, so we need to divide 4/5 of a meter in 5 parts.

This mathematically becomes: 4/5 divided by 5 which by the definition of division of rational numbers, is the same as :

4/5 times the reciprocal of 5 = (4/5) * (1/5) = (4/25) = 0.16 meters each board

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