Answer:
Randomized block design
Step-by-step explanation:
In the scenario described above, the subjects which are the different car types are grouped into fixed units of 4 called blocks with each unit then assigned randomly to a particular treatment condition, which are the 4 different types of tire. In the end, the mean mileage for each block is taken and compared to that of the other blocks. This type of research design improves the reliability of the result obtained as it also eliminates the occurrence of systematic error in the course of our experiment.
So 75 points is your 100%. You can do 60 over 75 is equal to X over 100. You divide your numerator(60) by your denominator(75) to get 85.7142857%, or to round to your nearest percent, your answer would be roughly 86%.
(-6,0)
Intersecting at x-axis means that the point at which it will intersect will have a x coordinate but no y coordinate.
So,In the equation,y=-3x-18
put y=0
-3x-18=0
or,3x=-18
or,x=-6
So,the point of intersection is (-6,0)
Simplify the expression.
2x^3-10x^2+22x-14
This is a great question! :3 First, if you have taken Geometry in high school (or in some cases middle school like I did) you will remember that there are dozens of important postulate and theorems. Now for simplicity's sake, the theorem that applies to your question is this:
Parallel Lines Theorem: If two
parallel lines are cut by a transversal, then
corresponding angles are congruent,
alternate interior angles are congruent, and
alternate
exterior angles are congruent. I will attach an image that represents an example of two alternate interior angles so you can visualize it. The transversal between the two parallel lines is what makes the two alternate interior angles congruent, without the lines being parallel, the two angles would be different degrees. All you need to know is that theorem I wrote above, and after you have memorized it, it becomes accepted knowledge and much simpler, trust me! I'm so sorry for rambling, I hope I didn't confuse you more than helping, if you still have a question feel free to ask! :)