Simplify the polynomial equation (5x^2 - 7x +10) +(7x^2 - 11) +(-x^2 +7x- 2)
1 answer:
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Answer:
The teacher select a sample of n =15 students. And he wanted to know if teaching a smaller class was more effective and students performed better, that means if and he obtaind a sample mean of
.
Based on this the correct system of hypothesis are:
Null hypothesis:
Alternative hypothesis:
And the best option for this case is:
a. H0: vs. H1:
.
Step-by-step explanation:
For this case we have the following previous info given:
represent the true mean
represent the true deviation
The teacher select a sample of n =15 students. And he wanted to know if teaching a smaller class was more effective and students performed better, that means if and he obtaind a sample mean of
.
Based on this the correct system of hypothesis are:
Null hypothesis:
Alternative hypothesis:
And the best option for this case is:
a. H0: vs. H1:
.
Answer:
(C) 18
Step-by-step explanation:
We can create a systems of equations. Assuming is Michelle's age,
is Joan's age, and
is Ryan's age, the equations are:
We can use substitution, since we know the "values" of m and j.
So we know that Joan is 18 years old.
Hope this helped!
Answer:
khan academy has a pretty good explanation on combining like terms. https://youtu.be/CLWpkv6ccpA. The image provided has the answer and what I did
