Answer:
1. Experiment
2. Observation study
3. Experiment
4. Observation study
5. Experiment
Step-by-step explanation:
Observational study Vs. Experiment
- An observational study is a study where researchers simply collect data based on what is observed and give results based on the data collected.
- There is no control over the variables in an observational study.
- An experiment is a method of applying treatments to a group and recording the effects.
- The variables in a an experiment can be controlled.
- An observational study is where nothing changes but in an experimental study we have control over groups and may change.
1. This is an experiment as people were divided into groups and treatment were given.
2. This is an observational study as no treatment was done on the people just political preference was measured on the basis of collected data.
3. This is an experiment as farmers were divided into groups and effects of a new pesticide was tested.
4. This is an observational study as the data collected told about effect of exercise on lowering the risk of cancer and no experiments were carried out.
5. This is an experiment as people were divided into groups and cholesterol was measured with and without exercise.
Answer:
You can find the midpoint of a line segment given 2 endpoints, (x1, y1) and (x2, y2). Add each x-coordinate and divide by 2 to find x of the midpoint. Add each y-coordinate and divide by 2 to find y of the midpoint. It's important to note that a midpoint is the middle point on a line segment.
In order to see the midpoint formula in use, let's look at an example.
Question:
Determine the midpoint of the line segment with the given endpoints.
A(3, 7), B(9, 1)A(3,7),B(9,1)
Solution:
We can use the formula for midpoint to determine the midpoint: M= (x1 + x2/2 , y1+y2/2)
First, plug the x and y value into the formula:
M=(3+9/2 , 7+1/2)
,
Then, we can calculate the midpoint:
(6, 4)
Answer: 6
Step-by-step explanation:
Let the number be x
If I increase twice my number by 5, the result is the same as if I triple my number and subtract 1. This can be formed into an equation as:
(2 × x) + 5 = (3 × x) - 1
2x + 5 = 3x - 1
5 + 1 = 3x - 2x
x = 6
The number you are thinking of is 6
Answer:
38
Step-by-step explanation:
38.23 is closest to 28, because neither the .2 or .03 is high enough to round the last whole number up