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NeTakaya
3 years ago
10

Which is equivalent to (3 + 4i )(3 - 4i )?

Mathematics
1 answer:
IceJOKER [234]3 years ago
5 0

Use the FOIL method to solve.

(3 + 4i)(3 - 4i)

(3 * 3) + (3 * -4i) + (4i * 3) + (4i * -4i)

9 - 12i + 12i - 16i

9 - 16i

Best of Luck!

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Tax Rate Change: Suppose a certain tax rate goes from 6% to 18%. Which of the following statements is NOT true?
igor_vitrenko [27]

Answer:

The c statement is not true.

Step-by-step explanation:

We need to check every statement to determine which one is false.

a. The old tax rate was 6% and the new one is 18%. The difference between the new and the old one will give us how much it's been increased. So 18-6=12, meaning the tax has increased 12%, so this statement is true.

b. If we multiply by 3 the old tax rate we get 6x3=18, which is the same as the new tax rate, so this statement is also true.

c. Increasing the tax rate 100% would mean multiplying by 2, since 100% is the same as the number, so adding that to the same number would double the amount. By the same logic, increasing it 200% would be the same as multiplying it by 3, and by 4 with a 300% increase. Since we already determined that the new tax was 3 times the old one, this statement is false, and the d. statement is true.

4 0
4 years ago
Please answer with clear instructions so that i can apply this to other questions
Mrrafil [7]

Answer:

1/6

Step-by-step explanation:

-1/m

-1/-6

1/6

4 0
3 years ago
What is the value of k in the equation?
RSB [31]

Answer:

k=67/1360

Step-by-step explanation: Step 1: Simplify both sides of the equation.

201=4080k

Step 2: Flip the equation.

4080k=201

Step 3: Divide both sides by 4080.

4080k

4080

=

201

4080

k=

67

1360

Answer:

k=

67

1360

3 0
3 years ago
Read 2 more answers
Can a collection of ideas be called a set?<br> Answer must be of 1 paragrah(8 lines)
Julli [10]

Answer:

Sets

Step-by-step explanation:

1) Set can be defined as a collection of objects that are well defined and distinct.

2) Since each idea has its own unique value or characteristic, they can be considered as objects.

3) Thus, a collection of ideas can be considered as a set.

4) In this case we would define the null set as the set with no ideas.

5) The sets can be represented with the help of curly brackets { }.

6) We can represent it in the set form as:

{Idea 1, Idea 2, Idea 3, Idea 4,...}

7) It can be considered a countable set as we can always count the number of ideas.

8) It is a finite set.

5 0
3 years ago
A store sells regular coffee for $5 a pound and gourmet coffee for $8 a pound. To get rid of 30 pounds of the gourmet coffee, a
ASHA 777 [7]

Answer:

60 pound

Step-by-step explanation:

Calculation for How many pounds of regular coffee should he use

Let pounds of regular coffee be x

Let value of regular coffee be 5x

Let cost of gourmet coffee be 8

Let value of gourmet coffee be 8*30

Let pounds of mixture be 30+x

Let value of mixture be 6(30+x)

Equation:

5x+(8*30)=6(30+x)

5x+240=6(30+x)

Now Let Solve for x:

5x+240=180+6x

240-180=6x-5x

60=1x

x=60/1

x=60

Therefore, he should use $60 pounds of regular coffee

4 0
3 years ago
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