A triangle has one angle that measures 72 degrees and one angle that measures 18 degrees what kind of triangle is it
1 answer:
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Answer:
No Solution
Step-by-step explanation:
Let us see the various conditions to check the number of solutions for a pair of linear equations.
Let our linear equations are
ax+by=c
px+qy=r
i) for Unique Solution
≠
=
≠
≠
ii) For No Solution
=
≠
iii) For many Solutions
≠
=
Let us see what ratio we have for our linear equation s
here
a=1 , b=-2 , c= 4
p=-3 , q = 6 , r = 12
=
= -
=
= -
=
=
- = -
≠
Hence it satisfies the second condition of No solution
Answer:
Step-by-step explanation:
Hello!
To study the threshold of hering the researcher took a random sample of 80 male college freshmen.
The students underwent an audiometry test where a tome was played and they had to press a button when they detected it. The researcher recorded the lowest stimulus level at which the tone was detected obtaining a sample mean of X[bar]= 22.2 dB and a standard deviation of S= 2.1 dB
To estimate the population mean, since we don't have information about the variable distribution but the sample size is greater than 30, you can use the approximation of the standard normal distribution:
X[bar] ±
Where the semiamplitude or margin of error of the interval is:
d=
Using a 95% level
d= 1.965 *
d= 0.46
The point estimate of the population mean of the threshold of hearing for male college freshmen is X[bar]= 22.2 db
And the estimation using a 95%CI is [21.74;22.66]
I hope this helps!