3 years ago

What are x,y, and z if x+y+4z=5, -2x+2z, 3x+y+2z=-1, i am desperate

1 answer:

6 0

Answer:

how I learned it in school was that the variable had to always equal something, so you would have to put on the side or where ever x=(a number) and also you multiply those numbers cause no sign would mean multiply (I'm so sorry if it's not write though, I hope I could help you a little)

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use the frequency table to find the probability of at most 4 responses received to this week's newspaper editorials.

ZanzabumX [31]

Answer:

Step-by-step explanation:

To get probability of AT MOST 4 responses means all the probabilities Equal to or Less Than 4.

From the table, that is probability of 0, 1, 2, 3 or 4. (OR in probability means adding)

Hence, we add the number of editorials for P=0,1,2,3, and 4 and then divide by total number of editorials.

$P(\leq4)= \frac{20+30+56+38+34}{200}\\P(\leq4)=\frac{178}{200}\\P(\leq4)=0.89$