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lana66690 [7]
3 years ago
15

One man is three times as old as another. Fifteen years ago the first was six times as old as the second. Find their ages now.

Mathematics
1 answer:
alex41 [277]3 years ago
4 0

Answer:

error

Step-by-step explanation:

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Enter the coordinates of the point on the unit circle at the given angle 360
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Answer:

(1, 0)

Step-by-step explanation:

360º is a full circle and is the same as 0º, so this is on the x-axis.

the y coordinate is 0

Since it's a unit circle on the x-axis the x coordinate is 1

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2 years ago
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ddd [48]

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Step-by-step explanation:

22/7x4^2=50.28

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Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that
timama [110]

Answer:

Step-by-step explanation:

Given that evolution theory hypothesizes that people should spontaneously follow a​ 24-hour cycle of sleeping and wakingdash–even if they are not exposed to the usual pattern of sunlight.

Sample size n = 8

df = 8- 1=7

Since population std deviation is not known, and sample size is small we can use only t test

H-0: x bar = 24\\H_a: x bar \neq 24

(two tailed test at 5% level of significance)

24

28

24

22

25

26

26

25

 

mean 25

 

sd 3.142857143

 

se 1.111167799

Test statistic = Mean diff/se = 1.595

p = 0.1546

since p >0.05, accept null hypothesis.

There is no evidence to prove that the steady cycle is different from 24 hours.

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3 years ago
14=6n+6-2n solve for n
Anika [276]

Answer:

n=2

Step-by-step explanation:

14=6n+6-2n

Combine like terms

14 = 4n+6

Subtract 6 from each side

14 -6 = 4n+6-6

8 = 4n

Divide by 4

8/4 = 4n/4

2 =n

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