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Zanzabum
3 years ago
10

Simplify. Write the expression using only positive exponents. m^−2 times n^3

Mathematics
2 answers:
steposvetlana [31]3 years ago
8 0
N^3/m^2 I believe is what you’re looking for
Sladkaya [172]3 years ago
8 0

Answer:

\boxed{\bold{\frac{n^3}{m^2}}}

Step By Step Explanation:

  • Apply Exponent Rule \bold{\:a^{-b}=\frac{1}{a^b}}

\bold{m^{-2}=\frac{1}{m^2}}

\bold{n^3\frac{1}{m^2}}

  • Multiply Fractions \bold{\:a\cdot \frac{b}{c}=\frac{a\:\cdot \:b}{c}}

\bold{\frac{1\cdot \:n^3}{m^2}}

  • Multiply: \bold{1\cdot \:n^3=n^3}

\bold{\frac{n^3}{m^2}}

\boxed{\bold{Mordancy}}

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Read this E[2X^2 â€" Y].
djyliett [7]

Looks like a badly encoded/decoded symbol. It's supposed to be a minus sign, so you're asked to find the expectation of 2<em>X </em>² - <em>Y</em>.

If you don't know how <em>X</em> or <em>Y</em> are distributed, but you know E[<em>X</em> ²] and E[<em>Y</em>], then it's as simple as distributing the expectation over the sum:

E[2<em>X </em>² - <em>Y</em>] = 2 E[<em>X </em>²] - E[<em>Y</em>]

Or, if you're given the expectation and variance of <em>X</em>, you have

Var[<em>X</em>] = E[<em>X</em> ²] - E[<em>X</em>]²

→   E[2<em>X </em>² - <em>Y</em>] = 2 (Var[<em>X</em>] + E[<em>X</em>]²) - E[<em>Y</em>]

Otherwise, you may be given the density function, or joint density, in which case you can determine the expectations by computing an integral or sum.

6 0
3 years ago
Ok so this isn't actual homework but I need help calculating this.
jeka57 [31]
Ok so there is 60 minutes in an hour and you have 107 minutes so
107-60 = 47 ( 60 has become an hour)

So we are left with 47 minutes, so add the hour to 7:45 which will make it 8:45 pm
Then add 15 to make it 9:00 pm ( 47 - 15 = 32)

And so then add 32 minutes to 9:00 pm 

Answer is 9:32 p.m.
7 0
3 years ago
Find the area of the trapezoid.
goldenfox [79]

Answer:

<h3>105m²</h3>

Step-by-step explanation:

AREA=

\frac{(a + b)}{2}  \times h

\frac{15 + 6}{2}  \times 10

=105m²

6 0
3 years ago
Ill give you brainiest
White raven [17]

Answer:

D and C

Step-by-step explanation:

because EF is diameter

then radius diameter divided by 2

8 0
3 years ago
The number of children playing on a playground was recorded over several days. The data was displayed in both a histogram and st
navik [9.2K]

Answer:

It is the one you have selected. "The exact number of children on the playground each day."

Step-by-step explanation:

The stem and leaf plot shows each amount of children specifically. The histogram has the ages in groups. The stem and leaf plot is more specific and shows the inside information while the histogram only shows the number of children and frequency put in groups. I also took the quiz and got this right.

Hope this helps! Make sure to give me brainiest if somebody else answers.

5 0
3 years ago
Read 2 more answers
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