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Burka [1]
4 years ago
15

Simplify the expression. (3 points) -5+i/2i WILL GIVE BRAINLY

Mathematics
1 answer:
Verizon [17]4 years ago
6 0
\bf recall~that\qquad i^2=-1\\\\
-------------------------------\\\\
\cfrac{-5+i}{2i}\cdot \cfrac{i}{i}\implies \cfrac{i(-5+i)}{2i^2}\implies \cfrac{-5i+i^2}{2(-1)}\implies \cfrac{-5i+(-1)}{-2}
\\\\\\
\cfrac{-5i-1}{-2}\implies \cfrac{1+5i}{2}
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Given f(x)= 3x+2, what is the Inverse Function?
Grace [21]

Answer:

Step-by-step explanation:

For this case we must determine the inverse of the following function:

f(x)=3x-2

Step 1:

We would write

y=f(x) or y=3x-2

Step 2:

We clear x:

y+2=3x

\frac{y+2}{3}=x

Step 3:

"x" and "y" are exchanged:

y=\frac{x+2}{3}

The inverse is:

f^{-1}(x)=\frac{x+2}{3}

8 0
3 years ago
Which of the following have the correct solution? Check all
Neko [114]

Step-by-step explanation:

To do this, we will substitute the x values to their corresponding equations,

1)

2x + 5 \\  = 2(7) + 5 \\  = 14 + 5 \\  = 19

Given 2x + 15 = 19

Calculated 2x + 15 = 19

Given = Calculated, this solution is correct.

2)

3 + x + 2 -x \\  = 3 + 3 + 2 - 3 \\  = 8 - 3 \\  = 5

Given 3 + x + 2 - x = 16

Calculated 3 + x + 2 - x = 5

Given not equal to calculated, this solution is incorrect.

3)

\frac{x + 2}{5}  \\  =  \frac{8 + 2}{5}  \\  =  \frac{10}{5}  \\  = 2

Given (x+2)/5 = 2

Calculated (x+2)/5 = 2

Given = Calculated, this solution is correct.

4)

6 = 2x - 8 \\ 2x - 8 = 6

2x - 8  \\  = 2(7) - 8 \\  = 14 - 8 \\  = 6

Given 2x - 8 = 6

Calculated 2x - 8 = 6

Given = Calculated, this solution is correct.

5)

14 =  \frac{1}{3} x + 5 \\  \frac{1}{3} x + 5 = 14

\frac{1}{3} x + 5 \\  =  \frac{1}{3}(18) + 5 \\  =  \frac{18}{3}   + 5 \\  = 6 + 5 \\  = 11

Given 1/3x + 5 = 14

Calculated 1/3x + 5 = 11

Given not equal to Calculated, this solution is not correct.

Therefore the Correct solutions are 1,3 and 4.

8 0
3 years ago
Jason has "buy one get one free" tickets to the comedy club. He is bringing 7 people including himself. If the regular price is
vladimir2022 [97]
The answer is B; $ 59.00. All you have to do is multiply the price times 4 and then subtract that from 100. Then do it again and 59 should be your answer.
3 0
3 years ago
Carlos biked 24 miles and ran 6 miles. Write the ratio of the distance Carlos biked to the total distance
Brrunno [24]

Answer:

18 miles run


Step-by-step explanation:


5 0
3 years ago
Which is not a rational number <br>0.77777...<br>11/13 <br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B19%7D%20" id="TexFormu
Ymorist [56]

Answer:

the square root of 19

Step-by-step explanation:

this is because it has no rational value

5 0
3 years ago
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