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mart [117]
3 years ago
15

Can someone help me with number 15

Mathematics
1 answer:
Shalnov [3]3 years ago
4 0

Answer:

Step-by-step explanation:

We will evaluate that with n values starting at 1 and ending at 5.  To do that, simply replace the exponent n with 1, then 2, then 3, then 4, then 5.

f(1)=(\frac{2}{3})^1  so

f(1)=\frac{2}{3}

Then f(2):

f(2)=(\frac{2}{3})^2 simplifies a bit so maybe it's easier to see how to handle this:

f(2)=(\frac{2^2}{3^2}) so

f(2)=\frac{4}{9}

Then f(3):

f(3)=(\frac{2^3}{3^3})=\frac{8}{27}

And f(4):

f(4)=(\frac{2^4}{3^4})=\frac{16}{81}

And finally, f(5):

f(5)=(\frac{2^5}{3^5})=\frac{32}{243}

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Natalka [10]

Answer:

x = 1    y = 3    z = 1

Step-by-step explanation:

(1)  x - 3y - z = -9           (2)   -2x + y + 2z = 3        (3)   2x + y + 3z = 8

                                2x(1)     <u>2x - 6y - 2z = -18</u>      (2)  <u>-2x + y + 2z = 3</u>

                                                 - 5y = -15                           2y + 5z = 11

                                                      y = 3                            2(3) + 5z = 11

                                                                                            6 + 5z = 11

                                                                                                  5z = 5

                                                                                                    z = 1

       x - 3(3) - 1 = -9

       x - 9 - 1 = -9

            x - 10 = -9

            x = 1

Note:  If you write your equations across your paper, then the work can just flow down the paper.  It makes it so much easier to show the work you have done.  OK?

5 0
2 years ago
Help me show work please
skad [1K]
X+X+3xX+4 divided by X = F
5 0
3 years ago
PLEASE HELP !
adell [148]
First what you wanna do is get y by it’s self. To do that is to first add 5 on each side.

-5+3y=-4
+5 +5

3y= 1

Than you divide 3 on each side and it would give you y=1/3 if it’s a fractions problem but if you looking for decimals you would have to divide 1 by 3 which gets you .33333333.
7 0
3 years ago
Simplify the expression: (7 times 18 plus 45) divided by 6
neonofarm [45]

Answer:

28.5  PLEASE GIVE ME BRAINLIEST

Step-by-step explanation:

(7 x 18 + 45) ÷ 6

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3 years ago
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