7-6v = -5 -8v

solve for v, im soo confused

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?

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

Zack and tia played chess for 50 min they put the chessboard away at 11: 20 when did they start