Answer:
Option A
Step-by-step explanation:
Two equations have been given as,
A. (2x - 1) = 5x
B. -1 = 3x
To find equation B from equation A:
Subtract same quantity (2x) from both the sides of the equation A
(2x - 1) - 2x = 5x - 2x
(2x - 2x) - 1 = 3x
-1 = 3x [Equation B]
Therefore, Option A will be the answer.
Since, we are getting the same value of x from both the equations, both the equations are equivalent.
Option A. YES
They're all similar. Problem one you need to think how can I eliminate one of the variables to solve for the other one. Think muliplication in your head when doing this but as same time look for a way to subtract the variable you are eliminatiing should equal 0 then you solve the varialbe by itself. After you find one variables solution you need to substitute that solution into the variables place from one of the two original equations. I would think multiplying the -2y by 3 and 3y by 2. Notice one has a negative and other is positive so when I add the two equations I'll get 0y. However do not forget to multiply both equations by the multiplied number you used to each term in the equation. you should get 35x = 35 then x=1. Now you need to find y by substituting the 1 for either x-value in the two equations such as 4(1) + 3y = -5 now just solve for y and you get y = -3. your answer should be (1, -3). Notice you can always check and verify your right by substituting your values found into both solutions to get 15 = 15 and -5 = -5.
Answer:
B: Yes, the participants are grouped by sun exposure, and then both treatments are randomly assigned within each group.
Step-by-step explanation:
Randomized block design is one in which the experimental units are categorized into groups which we call blocks. Thereafter, treatments will be randomly allocated to the experimental units inside each of the blocks.
Now, from the question, we can see that they were grouped in Blocks according to their outdoor activity which is degree of exposure to the sun. Thereafter the individual groups are randomly assigned treatments.
Thus, Option B is correct.
X - 3 < = 5
x < = 5 + 3
x < = 8
closed circle on 8 (it is closed because there is an equal sign in the problem)...and since it is less then, it will be shaded to the left.