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Marta_Voda [28]
4 years ago
6

Multiply the following complex numbers (4-6i)(6-8i)

Mathematics
2 answers:
Bad White [126]4 years ago
6 0
(4-6i)(6-8i)

24-32i-36i+48i²

24 + -68i - 48

-24-68i
iragen [17]4 years ago
4 0
4*6=24
4*(-8i)=-32i
-6i*6=-36i
-6i*(-8i)=(-6*-8)(i*i)=(48)(-1)=-48
(4-6i)(6-8i)=
-24-68i
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What is the answer please help
hram777 [196]

Answer:

B: 22.5 degrees

Step-by-step explanation:

The interior angles of a pentagon add up to 540 degrees

(if you dont believe me you can turn a pentagon into three triangles, 3x180 = 540)

So you have four same angles say measure "x" degrees, and one final one that measures "5x" degrees, so 9x = 540, and x = 60

Unless I read the problem wrong, 60 degrees is the answer which is not an option :P

Edit: Yea I read it wrong, the final angle is 5 times the other four angles COMBINED, so that angle measures "20x" degrees.

The total would be 24x = 540, and so x = 22.5

4 0
3 years ago
Sue travels by bus or walks when she visits the shops. The probability that she catches the bus to the shops is 0.4. The probabi
Ksenya-84 [330]

Answer:

Proved,

P(A∪B)=0.72

Step-by-step explanation:

Sue travels by bus or walks when she visits the shops.

Probability( catch the bus to the shop ), P(A) = 0.4

Probability( catch the bus from the shop ), P(B) = 0.7

Both A and B are independent events.

Therefore,

P(A∩B) = 0.4×0.7

           = 0.28

Probability Sue walks one way = 1 - P(A∩B)

                                                   = 1 - 0.28

                                                   = 0.72

Hence, the probability that Sue walks at one way is 0.72

3 0
3 years ago
What is 5x-4y=-7 (-20,-8)in slope intercept form
forsale [732]

For this case we have that by definition, the equation of the line of the slope-intersection form is given by:

y = mx + b

Where:

m: It is the slope of the line

b: It is the cut-off point with the y axis

We have the following equation:

5x-4y = -7

We manipulate algebraically to write the equation of the slope-intersection form:

-4y = -7-5x\\4y = 5x + 7\\y = \frac {5} {4} x + \frac {7} {4}

We check if the given point belongs to the equation:

y = \frac {5} {4} (- 20) + \frac {7} {4}\\y = -25 + \frac {7} {4}\\y = \frac {-100 + 7} {4}\\y = - \frac {93} {4}

The point does not belong to the equation.

ANswer:

y = \frac {5} {4} x + \frac {7} {4}

4 0
3 years ago
Will give BRAINLIEST to correct answer.<br><br> Given that ℓ1 ∥ ℓ2, find x.
lisov135 [29]

X = 38

2x is equal to the angle next to the x + 66 angle because ℓ1 ∥ ℓ2 is parallel so:

2x + x + 66 = 180 -- combine like terms

3x + 66 = 180 -- subtract 66 from both sides

3x = 114 -- divide by 3 on both side

x = 38

5 0
2 years ago
Can somebody please help
Digiron [165]

i honestly don't know :-l

7 0
3 years ago
Read 2 more answers
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