Answer:
e). the sample size is n = 1000 and 50 percent of all students use the vending machines.
Step-by-step explanation:
The efficiency of the test would be highest when the sample size includes a minimum of 1000 samples and at least half of the students must use them. Conducting the test under such conditions would make it impactful and show if the idea would be successful and beneficial or not. <u>If a lesser percentage of students use it, its investment might be difficult to recover or if the test is conducted with a smaller population, the results or outcomes might not be reliable or trustworthy for representing the entire population</u>. Thus, <u>option e</u> shows the correct situations.
x = -1
Step-by-step explanation:
or
Since both sides have the same base, we can write
10x = 5x - 5
or
5x = -5
x = -1
Answer: y=2
Step-by-step explanation:
2x+3y=14 - 2x-y=6 = 4y=8
y=2
If you need x, just insert y into the equation and work out x from there
2x-2=6
2x=8
x=4
