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svp [43]
3 years ago
15

What cross section shape is formed when the figure is cut as shown?

Mathematics
1 answer:
kirza4 [7]3 years ago
7 0

Answer:

Triangle

Step-by-step explanation:

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If a^2+1/a^2=79 where (a>0), find the value of a^3 +1/a^3
Nastasia [14]

Note the binomial expansion,

(<em>a</em> + 1/<em>a</em>)³ = <em>a</em> ³ + 3<em>a</em> + 3/<em>a</em> + 1/<em>a</em> ³

so

<em>a</em> ³ + 1/<em>a</em> ³ = (<em>a</em> + 1/<em>a</em>)³ - 3 (<em>a</em> + 1/<em>a</em>)

Similarly,

(<em>a</em> + 1/<em>a</em>)² = <em>a</em> ² + 2 + 1/<em>a</em> ²

We're given <em>a</em> ² + 1/<em>a</em> ² = 79, so

(<em>a</em> + 1/<em>a</em>)² - 2 = 79

(<em>a</em> + 1/<em>a</em>)² = 81

<em>a</em> + 1/<em>a</em> = ±9

but <em>a</em> > 0, so we ignore the negative solution.

Then

<em>a</em> ³ + 1/<em>a</em> ³ = 9³ - 3×9 = 702

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Evaluate: 24 divided (8 -2)
uysha [10]

Answer:

4

Step-by-step explanation:

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How to solve fraction equations with variables on both sides
astraxan [27]
Do the inverse operation on both sides
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Ostuni evaluated -4 + x for x = -9 1/2 and got an answer of 5 1/2. What might the student have done wrong?
Sav [38]
The student added 9 1/2 instead of adding -9 1/2
8 0
3 years ago
Look at this equation. 3(x + 1) = 3x + Which number can be placed in the box that would create an equation that has an infinite
luda_lava [24]
Your final equation would be 3(x+1)= 3x+3 because if you do 3 times x you get 3x so if you do 3 times 1 you get 3 making the equation have infinite solutions. 

The final answer is: 3(x+1)= 3x+3 for an infinite number of solutions. 
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4 years ago
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