1. A physics contest has 30 multiple-choice

1 answer:

5 0

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Determine the solution set of x2 - 80 = 0

meriva

   x² - 80 = 0
Add 80
to each side: x² = 80

Square root
each side: x    = √80

Look it up: x = + 8.944... (rounded)
   and
   x = - 8.944... (rounded).
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Here's a cleaner solution:

   x² - 80 = 0
Add 80
to each side: x² = 80

Square root
each side: x    = √80

But 80 = 16 · 5

So √80 = √16 · √5

√16 = 4, so    x = 4 √5

8 0

3 years ago

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The measure of angle t is 60 degrees. What is the x-coordinate of the point where the terminal side intersects the unit circle?

Anestetic [448]

Angle t would be equal to cos(60 degrees) which has coordinates (1/2,sqrt3/2) so that answer is 1/2

7 0

3 years ago

Can you plz help me solve this<br>simplify the expression <br>8w-13w+6-20-10w

OverLord2011 [107]

Answer:

this is your answer