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Alecsey [184]
3 years ago
9

A regular triangle rotated about its center by 360 degrees maps onto itself at

Mathematics
1 answer:
grin007 [14]3 years ago
7 0

Answer:

there is a lot of different rotations

Step-by-step explanation:

and multiple of 360 and could go infinitely while 90, 180, 270 degrees will not work.

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Which problem solving strategy would be best to solve this problem? How many different ways can you give change for 45 cents?
hodyreva [135]
I think A since working backwards and looking for a pattern wouldn't help, maybe C but im not sure
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3 years ago
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Fiind the value of x between 0 and 360 <br>for question 5sin 2x=7cos2x​
Degger [83]

Answer:

x=pi*n/2+1/2arctan(7/5)

Step-by-step explanation:

5sin(2x)=7cos(2x)

5tan(2x)=7/5

2x=pi*n+arctan(7/5)

x=pi*n/2+1/2arctan(7/5) for n e Z

6 0
3 years ago
. A used car dealer says that the mean price of a two-year old sedan (in good condition) is at least $20,500. You suspect this c
Taya2010 [7]

Answer: There is sufficient evidence to reject the dealer's claim that the mean price is at least $20,500

Step-by-step explanation:

given that;

n = 14

mean Ж = 19,850

standard deviation S = 1,084

degree of freedom df = n - 1 = ( 14 -1 ) = 13

H₀ : ц ≥ 20,500

H₁ : ц < 20,500

Now the test statistics

t = (Ж - ц) / ( s/√n)

t = ( 19850 - 20500) / ( 1084/√14)

t = -2.244

we know that our degree of freedom df = 13

from the table, the area under the t-distribution of the left of (t=-2.244) and for (df=13) is 0.0215

so P = 0.0215

significance ∝ = 0.05

we can confidently say that since our p value is less than the significance level, we reject the null hypothesis ( H₀ : ц ≥ 20,500 )

There is sufficient evidence to reject the dealer's claim that the mean price is at least $20,500

6 0
3 years ago
8 times the product of 5 and t
Zielflug [23.3K]
Product is another word for multiplication. so its 8 multiplied by 5 multiplied by 't'

8× 5(t)
4 0
3 years ago
HURRY PLEASE
jok3333 [9.3K]

Answer:

m= -1

Step-by-step explanation:

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3 years ago
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