If a =3 and b = -1, what is the value of ab-b2?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Ahypothesis is: a the average squared deviations about the mean of a distribution of values b) an empirically testable statement that is an unproven supposition developed in order to explain phenomena a statement that asserts the status quo; that is, any change from what has been c) thought to be true is due to random sampling order da statement that is the opposite of the null hypothesis e) the error made by rejecting the null hypothesis when it is true

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.