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stira [4]
3 years ago
5

HELP ME PLEASE I NEEED THIS <33

Mathematics
1 answer:
solong [7]3 years ago
5 0

Since angle COB is the central angle of arc CB, the measure of arc CB = 80 degrees

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What is the radius of a circle in which a 30° arc is 2π inches long?
son4ous [18]

First of all, let's recall that the full circumference is

C = 2\pi r

Now, since 30 is one twelfth of 360, a 30° arc will be one twelfth of the whole circumference. So, if you call the arc length A, you have

A = \cfrac{C}{12} = \cfrac{2 \pi r}{12} = \cfrac{\pi r}{6}

Since we know the arc length, we can build and solve the following equation:

\cfrac{\pi r}{6}  = 2\pi \iff \cfrac{r}{6} = 2 \iff r = 12

8 0
3 years ago
I need help with creating some equations for an assignment. These are the types of equations I need:
kondor19780726 [428]
Hi there!

Here are some examples for you:

Two one step equations:
6x = 36
y + 5 = 10

Two equations containing fractions:
1/2x = 4
3/4y + 1 = 8

One equation using the distributive property:
2(x + 5) = 3

One equation with a decimal:
2.5x + 5 = 10

One real world problem that is solved by an equation:
At the beginning, I had 5 cups of flour. I made a batch of cookies. Now, I have 3.5 cups of flour. How much flour did I use?
5 - x = 3.5

Hope this helps!! :)
If there's anything else that I can help you with, please let me know!
7 0
3 years ago
Read 2 more answers
Lisa needed 1 cup of white sugar to 2 cups of brown sugar to make one batch of cookies.What would be the ratio of white sugar to
raketka [301]
1 cup : 2 cups of brown sugar

1:2

4 batches of cookies, so multiply both numbers by 4. 

4:8

Answer: 4 to 8
4 0
3 years ago
Please guys this is easy, I need help ASAP! (Giving brainliest)!
jasenka [17]

Answer:

4a. 13

4b. -4

Step-by-step explanation:

2x-6/5 = 4 (Muti each side by 5)

2x-6 = 20

2x = 26 (Divide each side by 2)

x = 13

7- 2x/4 = 9

-2x/4 = 2 (Muti each side by 4)

-2x = 8 (Divide each side by -2)

x = -4

5 0
2 years ago
Mr. Lester's maximum heart rate is 180 beats per minute. When he exercises at the gym.
Basile [38]

Answer: 108

Step-by-step explanation: 60% of 180 is 108

8 0
3 years ago
Read 2 more answers
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