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Serga [27]
3 years ago
10

Factor the expression 3x^2-15x

Mathematics
1 answer:
tester [92]3 years ago
5 0
Factor out 3x
Answer: 3x(x - 5)
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Circle the numbers that run to 245000 When rounding to the nearest thousand 245 500 245100 245700 245450?
SVETLANKA909090 [29]
<span>There are two answers and they are:
245100
</span><span>245450</span>
8 0
3 years ago
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A regular room at the Great Wolf Lodge is $229.99. You have a discount code to get 20% off of the room rate. The sales tax on th
vovangra [49]
229.99*.20 = $46 off
229.99-46 = $183.99
$183.99*.13 =$23.92 sales tax added
183.99+23.92 = $207.91
 


6 0
4 years ago
Read 2 more answers
Show all your steps to your answer. 9x +6y = 78<br> 3х - 6y = -30
GuDViN [60]

Answer:

x=4

Step-by-step explanation:

You put 9x+6y=78 over 3x-6y=-30. Then, you are going to add the two equations. So, you are going to do 9x+3x, 6y-6y (since the second 6 is negative, it ends up subtracting), and 78-30. You will end up canceling the 6y's, and end up with 12x=48. Then, you will divide 48 by 12, and get x=4. Hope this helped:)

5 0
3 years ago
What is the exact value of cos(7pi/8)
Damm [24]

Answer:

cos (\frac{7\pi}{8}) = -\frac{\sqrt{2+\sqrt{2}}}{2}

Decimal value: −0.9238795325...

Step-by-step explanation:

Write,

cos \frac{7\pi}{8} = cos (\pi-\frac{\pi}{8}) = −cos \frac{\pi }{8}

Now using half angle formula, cos(x) = 2 cos²(\frac{\pi }{2}) − 1, we can write cos \frac{\pi }{4} = 2

cos²(\frac{\pi }{8}) − 1

This means \frac{1}{\sqrt{2}} + 1 = 2 cos²(\frac{\pi }{8})

2 cos²(\frac{\pi }{8}) = \frac{\sqrt{2}+1}{\sqrt{2}}

cos²(\frac{\pi }{8}) = \frac{\sqrt{2}+1}{2\sqrt{2}}

cos(\frac{\pi }{8}) = \sqrt{\frac{\sqrt{2}+1}{2\sqrt{2}}}

Simplify,

\sqrt{\frac{\sqrt{2}+1}{2\sqrt{2}}} = \sqrt{\frac{2+\sqrt{2}}{4} = \frac{\sqrt{2+\sqrt{2}}}{2}

Hence,

cos (\frac{7\pi}{8}) = −cos (\frac{\pi }{8}) = -\frac{\sqrt{2+\sqrt{2}}}{2}

3 0
3 years ago
Read 2 more answers
FINDING SLOPE FROM A TABLE
astraxan [27]

Answer:

The code is 2,-3, 1, 1/2

So, the letters would make the word... “idea” <— that’s the letter code

Step-by-step explanation:

Use the slope-intercept form to find the slope, which is y = mx + b

3 0
3 years ago
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