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ruslelena [56]
3 years ago
8

Simplify the expression square root of -25/(5-2i) + (1-3i)

Mathematics
1 answer:
Georgia [21]3 years ago
6 0

Answer:

I guess \frac{25}{6} -5i

Step-by-step explanation:

\frac{-25}{(5-2i)+(1-3i)}              1. rewrite the expression(it helps me tbh)

\frac{-25}{5 - 2i+1-3i}                   2. Distribute the positive symbol to (1-3i)

\frac{25}{6-5i}                           3. treat i as a variable while you combine like terms

\frac{25}{6} -5i                       4. divide 25 by 6-5i but leave 25/6 as a fraction since it can't be divisible.

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X-Y=5, 6X-6Y =?
denis-greek [22]

Answer:

<u>Yes, it is 30</u>

Step-by-step explanation:

And yes, you thought it through correctly.  6(X-Y) = 6*5

6(X-Y) = <u>30</u>

3 0
3 years ago
Read 2 more answers
Using 50 observations, the following regression output is obtained from estimating y = β0 + β1x + β2d1 + β3d2 + ε. Coefficients
pickupchik [31]

Answer:

The answer is "789.03 and 806.16".

Step-by-step explanation:

y\^ \ \ = -0.45 + 3.78(x)  -11.88(d_1) + 5.25(d_2)

For point a:

Calculating the value for y\^  \ \  x = 212,\ \  d_1 = 1, and  \ \ d_2 = 0

y\^  = -0.45 + 3.78(212)  -11.88(1) + 5.25(0)

     = -0.45 + 801.36 -11.88 + 0\\\\= 789.03  

For point b:

Calculating the value of y\^ \ \ for \ \ x = 212, \ \ d_1 = 0, and \ \ d_2 = 1

y\^  = -0.45 + 3.78(212)  -11.88(0) + 5.25(1)  

    = -0.45 + 801.36 -0 + 5.25\\\\= 806.16

3 0
3 years ago
Which graph represents the inequality y&gt;1-3x
slava [35]

Answer:

b............ .......... which one is a b c d

For this case we must indicate the graph of the following inequality:

y≥1−3x

It is observed that inequality includes equality, so the boundary line of the graph will not be dotted, so we discard options D and C.

We test option A, we substitute the point (0,0) in the inequality, if it is fulfilled then the graph corresponds to it.

We test option A, we substitute the point (0,0) in the inequality, if it is fulfilled then the graph corresponds to it.

It is not fulfilled

We test the last option B, we choose the point (3,1) that belongs to the graph:

1≥1−3(3)

\1≥1−9

1≥−8

it is fulfilled

5 0
3 years ago
Help! Pls answer correctly!​
defon

Answer:

<h3>numbers of Ostrich he keep = 725</h3>

<u>Step-by-step explanation:</u>

  • Area of field = 30 × 155 + 90 × 45
  • Area of field = 4650 + 4050
  • Area of field = 8700 m²

  • 1 ostrich need = 12 m²

numbers of Ostrich = 8700 ÷ 12

numbers of Ostrich = 725

8 0
3 years ago
Please help me on #12
Verdich [7]
When you rearrange the equation, you find that the solution is b)
3 0
3 years ago
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