The serial number on a bill consists of a letter followed by seven digits and then a letter. how many different serial numbers are possible, given the following conditions? (a) letters and digits cannot be repeated. (b) letters and digits can be repeated. (c) the letters are nonrepeated consonants and the digits can be repeated. (let y be a consonant.)

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

The box plots show the average speeds, in miles per hour, for the race cars in two different races. which correctly describes the consistency of the speeds of the cars in the two races?

20 points plus brainliest andwer plus my hover hoard im v desperate ! evaluate the polynomial for x=-2 in the equation -3x^3+7x^2-7x-1 (simplify your answer)