Conditional equation, an identity, or a contradiction.
15y+32=2(10y−7)−5y+46

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

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?

You buy a veido game for $60 and the sales tax is 8% what is the total cost for the game including the sales tax