Here are two number machines, A and B. Input
Output
А
x 5
- 4
B
x
x3 + 8
Both machines have the same input, X.
Work out the input that makes the output of A three times the output of B.

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct