-5-n/9=-8
-3/7=-2/3+x
3x-13=7(x+2)-4(x-7)
1/2x-9=15-5/6x
8(4x-3)=6(-7x-4)
2(a-24)=16-1/3(9a+27)
^^ solve the equations above and explain how you got the answer.

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?

If f (x) = 2x2 +5/(x-2), complete the following statement: f(6) =

The probability that a u.s. resident has traveled to canada is 0.18 and to mexico is 0.09. a. if traveling to canada and traveling to mexico are independent events, what is the probability that a randomly-selected person has traveled to both? (page 109 in the book may ) b. it turns out that only 4% of u.s. residents have traveled to both countries. comparing this with your answer to part a, are the events independent? explain why or why not. (page 119 may ) c. using the %’s given, make a venn diagram to display this information. (don’t use your answer to part a.) d. using the conditional probability formula (page 114 in the book) and the %’s given, find the probability that a randomly-selected person has traveled to canada, if we know they have traveled to mexico.