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Marizza181 [45]
3 years ago
12

-3n + 4 + 8n = 79 = 4n + 18 = 38 =

Mathematics
2 answers:
inessss [21]3 years ago
4 0

Answer:

1.n=15

2.n=5

Step-by-step explanation:

Volgvan3 years ago
4 0
1.)N=15 2.)N=5 hope this helped !!
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A colony of ants carried away 6 of your muffins. That was 2/7 of all of them! How many are left?
notka56 [123]
If 2/7=6 then 1/7=3
So 3×7=21 I think
4 0
3 years ago
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A fruit stand has 28 apples, 20 oranges, and 12 pears. What is the ratio of apples to the total pieces of fruit?
ruslelena [56]
Data:
Apples = 28
Oranges = 20
Pears = 12

<span>What is the ratio of apples to the total pieces of fruit?
Solving:
</span>\frac{apples}{apples+oranges+pears} =  \frac{28}{28+20+12} =  \frac{28}{60} \frac{\div4}{\div4} \to\:\boxed{\boxed{ratio = \frac{7}{15}}}\end{array}}\qquad\quad\checkmark<span>
</span>
5 0
3 years ago
Use the algebra tiles to model x – 2.
choli [55]

Sorry for being late but the answer is B

3 0
3 years ago
Change 50/7 to mixed number: *
stiks02 [169]

Answer:

7 1/7

Step-by-step explanation:

7x7=49

50-49=1

7 1/7

7 0
3 years ago
Read 2 more answers
If i = StartRoot negative 1 EndRoot, what is the value of i 3?
12345 [234]

Answer:

i³ = - i

Step-by-step explanation:

<u><em>Explanation</em></u>:-

<u><em>Step(i)</em></u>:-

Given     i = \sqrt{-1}

we know that  cos π = -1

                        sin π = 0

now given data

we can write  i = \sqrt{cos\pi + i sin\pi  }

                      i =( {cos\pi + i sin\pi  })^{\frac{1}{2} }

<u><em>step(ii)</em></u>:-

In complex numbers nth roots of a complex number

Z = r(cosθ+i sinθ)

Z^{\frac{n}{2} }  = r^{\frac{n}{2} } (cos\pi +isin\pi )^{\frac{n}{2} }

Z^{\frac{n}{2} }  = r^{\frac{n}{2} } (cosn\pi/2 }+isinn\pi/2 )

Step(iii):-

   now       i =( {cos\frac{\pi }{2}  + i sin\frac{\pi }{2}  }) }

                i^{3}  =( {cos\frac{\pi }{2}  + i sin\frac{\pi }{2}  })^{3}  }

                i^{3}  =( {cos\frac{3\pi }{2}  + i sin\frac{3\pi }{2}  })}

By using trigonometric  

              cos\frac{3\pi }{2} = cos (\pi +\frac{\pi }{2} ) = -cos\frac{\pi }{2} =0

              sin\frac{3\pi }{2} = sin (\pi +\frac{\pi }{2} ) = -sin\frac{\pi }{2} = -1

             i^{3}  =( 0+ i (-1) ) = -i

<u><em>Final answer:-</em></u>

i³ = - i

                                                                                       

 

8 0
4 years ago
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