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Eddi Din [679]
3 years ago
13

What is the product of 5−2i and 3−4i? Enter your answer, in standard form, in the box

Mathematics
1 answer:
Lelechka [254]3 years ago
7 0

Answer:

\boxed{7-26i}

Step-by-step explanation:

The binomials are multiplied in the usual way, using FOIL or the distributive property:

  (5 -2i)(3 -4i) = 15 -20i -6i +8i²

Since i² = -1, this becomes ...

  = 15 -20i -6i -8 = 7 -26i

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What is x? 5x+4-367x2=45<br><br>Dont forget to use MDAS
muminat
I'm pretty sure it is 155
8 0
3 years ago
A pharmacist wants to make 36ml of a 65% hydrogen peroxide solution. how many pls of 75% hydrogen peroxide must he mix with 57%
faltersainse [42]

Answer:

16 mls of the 75% solution and 20 mls of the 0.57% solution.

Step-by-step explanation:

Set up a system of equations:

Let x = volume of 75% solution and y be volume of 57% solution

0.75x + 0.57y = 36*0.65

0.75x + 0.57y = 23.4.......(1)

x + y = 36.........(2)

From equation (2):

y = 36 - x

Substituting this into equation(1):

0.75x + (0.57(36 - x) = 23.4

0.75x + 20.52 - 0.57x = 23.4

0.18x = 23.40 - 20.52 = 2.88

x = 2.88/0.18

x = 16

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8 0
2 years ago
The x value in x squared -5x + 4= 0
zheka24 [161]

Answer:

x=0.8

Step-by-step explanation:

-5x + 4= 0

       -4    -4

-5x=-4

÷5

-x=-0.8

x=0.8

6 0
3 years ago
Solve: -4x-8x+17=23<br> check solution
Sveta_85 [38]

Answer:

x = -1/2

Step-by-step explanation:

To solve the equation, we first need to combine like terms:

-12x+17=23

Simplify further:

-12x=6

Divide by -12 on both sides to get:

x = -\frac{1}{2}

To check  the solution, plug x back into the original equation and check if we get the correct answer:

-4(-\frac{1}{2})-8(-\frac{1}{2})+17=23

2+4+17= 23

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Thus, it checks out and our answer is correct.

4 0
3 years ago
Four friends played a game. At the end of the game, their scores were -8, -2, 1, and -3. What is the lowest score?
kiruha [24]

Answer:

the lowest scoreis -3

Step-by-step explanation:

the lowest score is -3

4 0
3 years ago
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