4. My Favorite Mistake Describe and correct the error in solving for one of the variables in the system:
8x + 2y = -12 and 5x - y = 4
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Step 1 5x - y = 4
y = -5x + 4
y=5x-4
Step 2 5x - (5x - 4) = 4
5x -5x + 4 = 4
4 = 4
The mistake made was she
To fix this mistake, Ms. Polo should have

Jimmy can run 3.5 miles in 20 minutes. how far can ne run in one hour and ten minutes?

Asample of 200 rom computer chips was selected on each of 30 consecutive days, and the number of nonconforming chips on each day was as follows: the data has been given so that it can be copied into r as a vector. non.conforming = c(10, 15, 21, 19, 34, 16, 5, 24, 8, 21, 32, 14, 14, 19, 18, 20, 12, 23, 10, 19, 20, 18, 13, 26, 33, 14, 12, 21, 12, 27) #construct a p chart by using the following code. you will need to enter your values for pbar, lcl and ucl. pbar = lcl = ucl = plot(non.conforming/200, ylim = c(0,.5)) abline(h = pbar, lty = 2) abline(h = lcl, lty = 3) abline(h = ucl, lty = 3)

Which of the following statements must be true about this diagram? check all that apply. x°, y°, z°, & w°