Afair coin will be tossed 3 times. what is the probability that one heads and two tails in any order will result?

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Which of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?