I need help for algebra 2 for simplify form for example (3x-2i)(3x+2i)

Answers

Answer 1

Answer: Let's start...

$(3x-2i)*(3x+2i)$

$3x*3x+3x*2i-2i*3x-2i*2i$

$9x^2+6xi-6xi-4i^2$

$9x^2-4i^2$

we don't finish it yet...

$i^2=-1$

Let's replace it

$9x^2-4*(-1)$

$\boxed{\boxed{9x^2+4}}$

Answer 2

Answer: $(a+b)(a-b)=a^2-b^2\n\n (3x-2i)(3x+2i)=\n 9x^2-4i^2\n \n i=√(-1)\n i^2=-1\n \n 9x^2-4\cdot (-1)=9x^2+4$

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A circle has a diameter of 4 meters.
What is its perimeter (to the nearest hundredth)?

Answers

Answer:

Perimeter of circle = 12.57 meter.

Step-by-step explanation:

Given : A circle has a diameter of 4 meters.

To find : What is its perimeter (to the nearest hundredth).

Solution : We have given that diameter = 4 meters.

Perimeter of circle = pi * diameter.

Perimeter of circle = 3.14 * 4.

Perimeter of circle = 12.566

Perimeter of circle = 12.57 meter.

Therefore, Perimeter of circle = 12.57 meter.

When the shape is a circle, its perimeter is called the
"circumference" of the circle.

The circumference of a circle is always (pi) times its
diameter.

(pi) is roughly 3.1416 . So if the diameter is 4 meters,
then the circumference is

12.5664... meters .

Rounded to the nearest hundredth, that's 12.57 meters.

The equation of the line of best fit of a scatter plot is y = 12x + 7. What is the slope of the equation? −12 −7 12 7

Answers

Well,

Slope-intercept form is given as follows:
y = mx + b

In this equation, "m" is the slope, and "b" is the y-intercept.

y = 12x + 7

We can clearly see that the 12 in the equation is the "m" in the general slope-intercept form.

Therefore, the slope of the equation is 12.

i would say 12 i think

Please help to answer ASAP

Answers

The biker wants to sell a bike for $600 post mark up. You are trying to figure out the retail price as the store owner so that after the 55% mark up, the sale price is $600.

So to do so, take 600÷1.55 = $387.10.

On Monday,hakim stocked up on bottled water for the trip. On Tuesday, he purchased five more bottles to add to his collection. On Wednesday, half of his entire collection remained and he only had 7 left. How many did he have on Monday?

Answers

9 bottles

Because he drank half so at the climax he had 14, then he had bought 5 bottles on Tuesday so on Monday he had 5 less

Final answer:

Hakim had 19 bottles of water on Monday.

Explanation:

To find out how many bottles of water Hakim had on Monday, we need to work backwards from the information given. On Wednesday, he had 7 bottles of water which was half of his collection. So, if we double 7, we can find out how many bottles he had in total, which is 14. On Tuesday, he purchased 5 more bottles, so the total number of bottles he had on Tuesday was 14 + 5 = 19. Therefore, Hakim had 19 bottles of water on Monday.

Learn more about Bottled Water here:

brainly.com/question/15447613

#SPJ3

Please help me with these five math questions1. z = 2/3 for z - 1/5 = 5/8
True or False
2. t = 9 for 10 ½ = t + 1 ½
True or False
3. k + 2 1/9 = 1 1/3
4. Jose ran 8 ¼ miles to practice for an upcoming marathon. His training goal is to be able to run 15 ¾ miles. Write an equation for the additional amount of miles, m, Jose needs to reach his goal.
5. Solve the equation above for m.

Answers

1.) false

2.) true

3.) k=.7777777

4.) 15 3/4-m=8 1/4

5.) m=7 1/2

How do I get the rule

Answers

Stat->edit on the calculator and put the x in the first column and the y in the second.

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