What is the length of PR?
2 answers:
Answer:
The Length of PR is 40.
Step-by-step explanation:
Seeing since this is an <u>Isosceles Triangle</u> (triangle that has two sides of equal length) both PR and QR are equal in length. With this being the case we can equal them in an equation and solve for the variable n.
.... subtract n from both sides.
... divide both sides by 4
This gives us a value of 8 for n . Now we can plug that value into any of the two side equations and get a value for the length of both PR and QR.
So the Length of PR is 40.
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Answer:
1 % decrease
Step-by-step explanation:
The percent of decrease time can be written as the expression Now, we convert the fraction into a decimal:
We can convert this decimal into a percentage: 0.01*100 = 1%.
<u><em>PLZ MARK BRAINLIEST!!!</em></u>
<h2>Answer with explanation:</h2>
As per given , we have
Since , alternative hypothesis is right tailed, so the test is a right tailed test.
n= 1987
Proportion of adults believe that rudeness is a worsening problem :
Test statistic :
(since , the normal curve takes values of z from -7 to 7, so we use critical value to draw conclusion.)
The critical value for a significance level of 0.005= 1.645
Since , absolute test statistic value (12.09) is greater than the critical value (1.645), it means there is statistical significance and so we reject the null hypothesis.