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3 years ago

SImplify to standard form (a+bi) (12-9i)²

Mathematics

1 answer:

olga2289 [7]3 years ago

5 0

Answer:

Hello,

Step-by-step explanation:

Formula used (a+b)^2=a²+2ab+b²

$(12-9i)^2=3^2*(4-3i)^2\\\\=9*(16-9-24i)\\\\=9*(7-24i)\\\\=63-216i\\$

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SOS PLZ IDK THIS VERY WELL NEED HELP

zaharov [31]

Answer:

1. a. 25(1) + 10(2) + 3(3) + 10(4) = 94/140 = .671

2. b. Mark’s average < Jay’s average

Step-by-step explanation:

1. What is Mark’s slugging average?

The slugging average gives more weight to the multi-base hits (compared to single-base hits) in opposition with the batting average.

So, a single hit is worth 1 point, a double is worth 2 points, a triple 3 points and a homerun is worth 4 points. It's a weighted average calculation.

Mark had 25 singles, 10 doubles, 3 triples and 10 homeruns during 140 presences 140 at bat.

25(1) + 10(2) + 3(3) + 10(4) = 94/140 = .671

2. How does Mark's average compares to Jay's?

Let's first calculate Jay's slugging average then we'll be able to decide.

Jay had 10 singles, 6 doubles, 5 triples and 14 homeruns in 90 presences.

10 (1) + 6 (2) + 5 (3) + 14 (4) = 10+12+15+56 = 93 / 90 = 1.033

We can definitely say that Mark's slugging average (0.671) calculated above is lower than Jay's average (1.033). So,

b. Mark’s average < Jay’s average

8 0

3 years ago

(4/5-715) +15= Hurry

navik [9.2K]

Answer:

-699.2

Step-by-step explanation:

6 0

3 years ago

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Please help I would really appreciate it

vlabodo [156]

Answer:

Percentage Change Formula

Step-by-step explanation:

Percent change can be applied to any quantity you measure over time. If the price increased use the formula

((New Price - Old Price) / Old Price) × 100

If the price decreased flip the first part to

((Old price - new price)

and then follow the rest of the formula.

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2 years ago

Write an expression for the sequence of operations described below. Multiply u by t, subtract the result from v, then triple wha

Triss [41]

Answer:

The expression is 3(v - ut)

Step-by-step explanation:

* Lets explain how to solve the problem

- There are some words we can change them to mathematics symbols

# Add ⇒ +

# Subtract ⇒ -

# Multiply ⇒ ×

# Divide ⇒ ÷

- Ex:

# Add x and 6 ⇒ x + 6

# Subtract 7 from y ⇒ y - 7

# Multiply 5 by m ⇒ 5 × m = 5m

# Divide n by 2 ⇒ n ÷ 2 = n/2

* Lets solve the problem

- We want to write an expression for the sequence of operations

described below

- Multiply u by t, subtract the result from v, then triple what you have

* Lets make these operations

- Multiply u by t

∴ u × t = ut

- Subtract the result from v

- Means take ut from v, so v will come first

∵ The result is ut

∴ v - ut

- Triple what you have

∵ Triple means multiply by 3

∵ we have (v - ut)

∴ 3(v - ut)

* The expression is 3(v - ut)

7 0

3 years ago

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When too many variables are categorized in an analysis, several potential issues may occur. Which of the following is not one of

bija089 [108]

Answer: D. an increase in the number of categories as the data set becomes larger.

Step-by-step explanation:

When too many variables are categorized in an analysis, there are different potential issues may occur, some of these issues include:

• model performance suffers.

• rarely occurring categories may not be captured accurately.

• difficulty in differentiating among observations.

It should be noted that an increase in the number of categories as the data set becomes larger isn't one of the issues. Therefore, the correct option is D.

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2 years ago