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xxMikexx [17]
4 years ago
11

Multiply and simplify the product.

Mathematics
2 answers:
Julli [10]4 years ago
8 0
Simplifying the square of a complex binomial is done similarly to a purely real binomial, except that one was to remember the relation i² = -1.

Solving the equation (8 – 5i)<span>² is done below:

Rewriting </span>(8 – 5i)<span>²:

(8 - 5i)(8 - 5i) = 64 - 40i - 40i + 25i</span><span>²

Simplifying and applying </span><span>i² = -1</span><span>:
64 - 80i + 25(-1)
64 - 80i - 25
39 - 80i

From the choices, the answer is C. </span>
Whitepunk [10]4 years ago
8 0

Answer:

39 – 80i

Step-by-step explanation:


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Jeff and Darius are trying to gain weight for the football team Jeff weighs 20 pounds and is gaining 10 pounds per month Darius
MakcuM [25]

Let x be the number of months

Jeff weighs 20 pounds and is gaining 10 pounds per month

In 1 month weight gained is 10 pounds

in x month weight , 10x

so Jeff will gain 10x + 20 pounds

Darius Waze 150 pounds and is gaining 4 pounds per month

In 1 month weight gained is 4 pounds

in x month weight , 4x

so Darius will gain 4x + 150 pounds in x months

Now we make the wights same and solve for x

 10x + 20= 4x + 150

Subtract 4x  and subtract 20 from both sides

 10x + 20 - 4x= 4x + 150- 20

6x = 130

Divide both sides by 6

x= 21.67

so it will take 21.67 months for Jeff two way the same as Darius


3 0
3 years ago
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mrs_skeptik [129]
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7 0
3 years ago
What is 15.7 round to the nearest 10th
Anna [14]

15.7 is already rounded to the nearest 10th.

5 0
3 years ago
Keri uses the digits 7,5,4 and 8. Help Kerri write down all possible A. 4 digit odd numbers B. 4 digit even numbers. Use digit o
puteri [66]
8745, 8475, 7485, 7845, 4857, 4785, 8547, 8457, 5487, 5847, 4597, 4857

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5 0
4 years ago
If the range of the function g(x) =3x+2 is {2,5,11,17}, find the domain. ​
Aleonysh [2.5K]

Answer:

(0,1,3,5)

Step-by-step explanation:

Set g(x) equal to each respective range and solve for x

3x + 2 = 2

3x + 2 = 5

3x + 2 = 11

3x + 2 = 17

If we solve for each, we get

x = 0

x = 1

x = 3

x = 5

So our domain is

(0,1,3,5)

6 0
3 years ago
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