Given:
To find:
The LCD of the fractions.
Solution:
LCD means least common denominator.
Let us find the least common multiplier for the denominator.
The denominators are .
Factor :
Take a common in first 2 terms and -6 common in next two terms.
Take out common factor (a - 1).
------------- (1)
Factor :
Using identity:
------------- (1)
From (1) and (2),
LCM of
Therefore LCD is (a - 1)(a - 6)(a + 6).
Answer:
35
Step-by-step explanation:
Fatima sells 10 cookies each 1.50. Her cookie total is 15 dollars. Her teacher gives her an additional 20 dollars. 20+15=35.
Answer:
-43
Step-b-y-step explanation:
f(x)= -x^2+7x-13 so
f(-3)= - (-3)^2 + 7(-3) - 13
= -9 - 21 - 13
= -43.
A manager wants to test whether two normally distributed and independent populations have equal variances. the appropriate test statistic for this test is a "F-statistics."
<h3>
What is F-statistics?</h3>
An F statistic is a value obtained after performing an ANOVA test or even a regression analysis to determine whether the means of two populations differ significantly.
Some key features regarding the F-statistics are-
- It is comparable to a T statistic from the a T-Test; a T-test would then inform you when a single result is statistically significant, whereas a F test would then tell you if a set of variables is statistically significant.
- When determining whether your total results are significant, you must use the F statistic in conjunction with the p value. Why?
- A significant result does not imply that all of your variables have been significant.
- The statistic is simply comparing the cumulative influence of all the variables.
To know more about the F-statistics, here
brainly.com/question/17256783
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