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klemol [59]
3 years ago
9

I didn’t learn about this can you help me with this

Mathematics
1 answer:
arlik [135]3 years ago
5 0
If you're taking trig, the "sum and difference formulas for trig functions" are basic facts that you'll need to learn and commit to memory.  I'd suggest you look up these formulas on the net.  You will likely immediately find listings for the sine, cosine and tangent.
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as internet usage grows in a particular country, more and more of its regional governments are placing services online. thirty f
Svetradugi [14.3K]

16 regions do not have this type of website . And , \frac{8}{25} fraction of regions do not have this type of website .

<u>Step-by-step explanation:</u>

Here we have , as internet usage grows in a particular country, more and more of its regional governments are placing services online. thirty four out of the fifty regions have web sites that allows residents to file their residents to file their regional income tax online. We need to find how many regions do not have this type of website. what fraction of regions do not have this type of website .Let's find out:

It's given that , thirty four out of the fifty regions have web sites , region which don't have :

⇒ 50-34

⇒ 16

So, 16 region don't have this type of website!

Fraction of region that don't have this type of website is :

⇒\frac{16}{50}

⇒\frac{8(2)}{25(2)}

⇒\frac{8}{25}

Therefore , 16 regions do not have this type of website . And , \frac{8}{25} fraction of regions do not have this type of website .

7 0
3 years ago
Excursion boat on the river takes 2 1/2 hours to make the trip to a point 12 miles upstream and to return if the rate at which t
Mama L [17]

Answer:

Let the current speed be "c";

Then the boat speed in still wate is "5c":

-----------------------

Upstream speed:

distance = 12 miles ; rate = 5c-c = 4c mph ; time = 12/4c = 3/c hrs

---------------------------

Downstream speed:

distance = 12 miles ; rate = 5c+c = 6c mph ; time = 12/6c = 2/c hrs

Step-by-step explanation:

Equation:

time + time = 2 1/2 hrs

3/c + 2/c = 5/2

Multiply thru by 2c to get:

6 + 4 = 5c

c = 2 mph (speed of the current)

5c = 10 mph (speed of the boat in still water)

3 0
2 years ago
Suppose AC = 48, find the value of x. Then, find the length of AB and the length of BC.<br> 1
gladu [14]

Answer:

2x-4+3x+2=48

5x-2=48

5x=48+2

5x=50

x=10

Step-by-step explanation:

this

6 0
3 years ago
Which of the following is a square root of 3(cos(4pi/9)+i sin(4pi/9))
Margaret [11]

Answer:

— 4√16(cos(4π3)+isin(4π3))=2(cos(−π6)+isin(−π6))=√3−i. Explanation: De Moivre's formula tells us that: (cosθ+isinθ)n=cosnθ+isinnθ.

Step-by-step explanation:

6 0
3 years ago
Can someone explain this to me I need help T_T
vaieri [72.5K]

Answer: 6,800,000 people

Step-by-step explanation:

We are looking for the number of people, not the percentage of wealth that has been made up by the people.

2% of the people are the richest in the United States, and there are 340,000,000 people in total in the United States.

2% = 0.02

340,000,000 * 0.02 = 6,800,000

I hope this was helpful! :)

4 0
3 years ago
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