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Romashka [77]
3 years ago
7

A circle has a radius of 6cm . find the length s of the arc intercepted by a central angle of 169° .

Mathematics
1 answer:
Igoryamba3 years ago
3 0
The circumference of the circle is = 2 x pi x 6 = 37.7cm

To find the arc = 360 divided by 169 = 2.13

The arc = 37.7 divided by 2.13 =  17.69 cm
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How do I simplify the following to "a+bi" form: (1+2i)^3
damaskus [11]

Answer:

Expand it.

(1+2i)^3 is equal to (1+2i)(1+2i)(1+2i).

Multiply everything out (being sure to multiply <em>every</em> term. (1+2i) * (1+2i) = 1+2i+2i+4i^2.

i is the square root of negative one, so i^2 is just -1. 1+2i+2i-4 is what you get from the first two, so now simplify that:

1-4 + 2i+2i = (-3+4i) and now multiply that by (1+2i):

(-3+4i) * (1+2i) = -3 - 6i +4i +8i^2.

Simplify again, and the answer is: -11-2i

Step-by-step explanation:

I hope this helps - really my only tip is don't spend time thinking about what i is, that just hurts your brain. Just remember that i^2 is equal to negative one, and treat it like regular multiplication and you will be fine.

7 0
2 years ago
Guys plz help me with a few problems
trasher [3.6K]
It probably gos like this here's my answer for number 1 6/8 and 9/12. for number 3, 10/12 and 15/18.
4 0
3 years ago
Pls help
loris [4]

Answer:  

y = 4x² -19x -5

Step-by-step explanation:  

When you graph it (or use an appropriate tool), it can help us to figure out that the equation is:

y = 4x² -19x -5

(Quadratic regression = the process of determining the equation of a parabola that best fits a set of data)

<em>Hope this helps, have a nice day :D</em>

8 0
3 years ago
A line passes through the points A (2,-6) and B (-8,0). What is the slope of the line?
mezya [45]

Answer:

-2/5

Step-by-step explanation:

Your slope should be -2/5

In slope intercept for it should look like this, y= -2/5x+b.

Hope I helped

6 0
3 years ago
What is the volume of a rectangular prism that has a length of 18 inches, a width of 1 foot, and a height of 14 inches?
Ede4ka [16]
Answer:

The volume is 252 inches.

Step-by-step explanation:

Volume is length x width x height so
18 x 1 x 14 is 252
8 0
3 years ago
Read 2 more answers
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