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AlekseyPX
3 years ago
10

What is (-9)with exponent of 2

Mathematics
1 answer:
Dmitry_Shevchenko [17]3 years ago
6 0

Hey there! I'm happy to help!

An exponent of two means you square the number. So, we have -9×-9. Two negatives makes a positive, so our answer is 81.

Have a wonderful day! :D

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What’s is the sum of the series?
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Answer:

<h2>44</h2>

Step-by-step explanation:

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VMariaS [17]
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If 3x – 2 = 13, what is the value of x?
inessss [21]

Answer:

x = 5

Step-by-step explanation:

3x - 2 = 13 \\ 3x = 13 + 2 \\ 3x = 15 \\ x =  \frac{15}{3} \\ \huge \red{ \boxed{ x = 5 }}

8 0
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three cones have a volume of 192π cm³.Cone A has a radius of 2 cm. Cone B has a radius of 3 cm. Cone C has a radius of 4 cm. fin
andrew11 [14]

9514 1404 393

Answer:

  A: 144 cm

  B: 64 cm

  C: 36 cm

Step-by-step explanation:

The volume of a cone is given by ...

  V = (1/3)πr²h

Solving for h, we get ...

  3V/(πr²) = h

Filling in the given values, we get ...

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Then the heights of the different cones are ...

  A: r = 2, h = 576/4 = 144 . . . cm

  B: r = 3, h = 576/9 = 64 . . . cm

  C: r = 4, h = 576/16 = 36 . . . cm

8 0
3 years ago
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