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erastova [34]
2 years ago
9

Simplify the expression below as much as possible. (8 + 9i) + (5 - 91) - (8 - 7i)

Mathematics
1 answer:
Sauron [17]2 years ago
7 0

Answer:

B. 5 + 7i

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Distributive Property

<u>Algebra I</u>

  • Combining Like Terms

<u>Algebra II</u>

  • Complex Standard Form: a + bi
  • Imaginary Numbers

Step-by-step explanation:

<u>Step 1: Define expression</u>

(8 + 9i) + (5 - 9i) - (8 - 7i)

<u>Step 2: Simplify</u>

  1. Distribute negative:                     8 + 9i + 5 - 9i - 8 + 7i
  2. Combine like terms:                    5 + 7i
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The lists below gives the donations, in dollars that two different charities received in 1 day. Compare the means of the two dat
icang [17]

Answer:

The mean of Planted Society's donations received is higher than Bees Park Expansion's.

Step-by-step explanation:

To get the mean, you want to add all of the numbers up and divide by how many numbers up. For example, you add all of the values for Planted Society and get 140. We know that there are 7 numbers given, so we do 140 divided by 7 to get a mean of 20. Same with Bees Park Expansion; add to get a total of 152. There are 8 numbers, and 152 divided by 8 is 19. This means 20>19. Mean is also written as average in questions.

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3 years ago
Change to an improper fraction 4 2/3=
barxatty [35]
Solutions 

To solve the problem the first step is to m<span>ultiply the whole number by the fraction's denominator (4 x 3).Add the numerator (2) to the product. 

4 * 3 = 12 

12 + 2 = 14 

= 14/3 </span>
4 0
3 years ago
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8090 [49]

Answer:

Equations 1 & 3 are correct.

Explanation:

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2 years ago
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Which of the following are​ true? If​ false, explain briefly.​a) A​ P-value of 0.01 means that the null hypothesis is false.​b)
choli [55]

Answer:

a) false

b) true

c) false

d) false

Step-by-step explanation:

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b) p-value tells us the probabiltiy of finding null hypothesis to be true

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d) There is no fixed p-value to reject the null hypothesis

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