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denpristay [2]
3 years ago
8

Write questions to match the expressions 1. 3 + (4x12) 2. 36 divided by 4 3. 24 - (6+3)

Mathematics
1 answer:
kogti [31]3 years ago
7 0
...........................

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Solve for x.<br> 2x² +21x-61 = (x+7)²<br><br> Please
Ymorist [56]

Answer:

x = \frac{-7 +\sqrt{489} }{2}

x = \frac{-7 - \sqrt{489} }{2}

Step-by-step explanation:

2x² +21x-61 = (x+7)²

expand

2x² + 21x - 61 = x² + 14x +49

move everything to one side

x² + 7x - 12 = 0

use quadratic formula

x = \frac{-b +- \sqrt{b^{2}-4ac } }{2a}

plug in the values

x = \frac{-7 +- \sqrt{7^{2}-4(1)(-110) } }{2(1)}

solve

x = \frac{-7 +- \sqrt{49-4(1)(-110) } }{2}

x = \frac{-7 +- \sqrt{49 + 440 } }{2}

x = \frac{-7 +- \sqrt{489} }{2}

7 0
2 years ago
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Find the area of a square with side length x when x is equal to the given value.
marin [14]

Answer:

9

Step-by-step explanation:

3 0
2 years ago
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Subtract 5 from 1/3 of 23
WARRIOR [948]
The answer is 2.8. or around there

5 0
3 years ago
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What is the exact volume of the cone
Travka [436]

Answer:

V = \frac{400}{3}\pi

Step-by-step explanation:

Volume of a cone is:

V = \pi r^{2} \frac{h}{3}

Substitute values given:

V = \pi (5^{2} )(\frac{16}{3})

V = \pi (25)(\frac{16}{3} )

V = \pi \frac{400}{3}

V = \frac{400}{3}\pi

5 0
2 years ago
-12.166 divided by (-1.54)
Sloan [31]

Step-by-step explanation:

=-12.166/-1.54 [if - is in both numerator and denominator then they are cancled out]

=12.166/1.54

=7.9

4 0
3 years ago
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