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horrorfan [7]
3 years ago
8

PLEASE HELP IM BEGGING YOU PLEASEEE THABK U SO MUCH

Mathematics
2 answers:
k0ka [10]3 years ago
8 0

Step-by-step explanation:

not sure for the answer but take how many triangles there are if they are all same same size then use this equation x÷t=a x is 360° t is how many triangles in the octagon and a is ur answer

Lemur [1.5K]3 years ago
5 0
Angle a Central angles are 22.5 degrees. 360 divided by 16

Angle b 180-(90+22.5) = 67.5 degrees
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Determine the LCm of 15 and 20
docker41 [41]
If you just want to know what is the least common multiple of 20 and 15, it is 60. Usually, this is written as lcm(20,15) = 60
5 0
3 years ago
(a) Suppose you have 9 gold coins that look identical, but you also know one (and only one) of them is counterfeit. The counterf
alisha [4.7K]

Answer:

Step-by-step explanation:

You can split the coins into 3 groups, each of them has 3 coins. Weigh group 1 vs group 2, if one is lighter, that group has the fake coin. If both groups weigh the same, then group 3 has the fake coin.

Continue to split the group that has the fake coin into 3 groups, each group has 1 coin. Now apply the same procedure and we can identify the fake coin.

Total of scale usage is 2

b) if you have 3^n coins then you can apply the same approach and find the fake coin with just n steps. By splitting up to 3 groups each step, after each step you should be able to narrow down your suspected coin by 3 times.

Step 1: you narrow down to group of \frac{3^n}{3} = 3^{n-1} coins

Step 2: you narrow down to group of \frac{3^{n-1}}{3} = 3^{n-2} coins

Step 3: you narrow down to group of \frac{3^{n-2}}{3} = 3^{n-3} coins

...

Step n: Step 1: you narrow down to group of 3^{n-n} = 3^0 = 1coin

8 0
3 years ago
Find the product. 7/10 X 3/6
tiny-mole [99]
7 . 3
--- × ------
10. . 6


= 21
--------
60

= 7/20
4 0
3 years ago
What is the value of x
STALIN [3.7K]
X=11, set 10x+5x+15=180
                 15x+15=180, subtract 15 from 180= 165, then divide 165 by 15
7 0
3 years ago
Please help!!!!!!!!!!
Basile [38]

Answer:

1-c

2-b

3-a

Step-by-step explanation:

1. 7y=14

y=2

-7y=-14

y=2

so the equation has one solution

2. 0=0

so the equation has infinite solution

3. 0=2 false

so the equation has no solution

6 0
3 years ago
Read 2 more answers
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