Answer: C) He should also take a sample from each of the other history classes in all of the other grades in the middle school.
Step-by-step explanation:
In order for his sample to be representative of all middle school students Leo: C) Should also take a sample from each of the other history classes in all of the other grades in the middle school.
<h2>
What is sample?</h2>
Sample can be defined as the data that is randomly collected by a researcher so as to reach or draw a conclusion.
Since only one grade is being surveyed which is Mr. Barnes’s eighth-grade history classes, he should as well carryout the survey on Ms. Lopez and Mrs. Frank history class.
Inconclusion he should also take a sample from each of the other history classes in all of the other grades in the middle school.
Not only students in the 8th grade are in the middle school, there are other students in other grades who are in the middle school and are enrolled in history classes. Leo's sample is only from one grade of the middle school. In fact, including Ms. Lopez's and Mrs. Frank's classes in the selection of sample is not sufficient. Leo has to take a sample from the remaining grades to avoid making a wrong conclusion as a result of bias in the choice of data.
Answer:
t=7
Step-by-step explanation:
t-27=-(27-7)---> remove parenthesis (multiply by -1)
t-27=-27+7-----> combine like terms
t-27=-20--------> add 27 to both sides
t=7
Answer:
y-3=-3(x+2)
Step-by-step explanation:
Point-slope form is y-y1=m(x-x1).
So if the coordinates given are (-2,3) you substitute the y1 and x1 with those variables, along with determining the slope which is -3/1 because the line goes up towards the left rathar than the right side making it negative.
And there's your equation! Hope that helped.
Answer:
The answer is "Choice B, C, and F is correct".
Step-by-step explanation:
The following are choices, which is missing in the question, that can be defined as follows:
A) {x| x ≥ 3} is the domain.
B) The set shall be {y| y ≥ –1}.
C) over the interval (–∞, 3), is the function, that decreases.
D) it's over the duration the function increases its value, that is (–1, ∞).
E) The symmetry axis will be x = – 1.
F) vertex is (3, – 1).
- In choice A, It is incorrect even though f is the domain, which is all true numbers because it has a quadrant function.
- In choice B, it is correct.
- In choice C, It is valid because it was a parable open with vertex so if we exploded view f (3, -1). Because as value opens up, its value with x from-∞ to 3 drops while it goes up from increasing from 3 to ∞.
- In choice D, It is wrong since we have just said f decreases from-∞ to 3. Therefore, f decreases from -1 to 3, too. Therefore, f doesn't grow from -1 to ∞.
- In choice E, It is incorrect because the symmetry axis is x = 3.
- In choice F, it is true.
