Which ordered pair is the solution to the system of equations?
x+y=4
x-y=-6
a.
(2, 2)
b.
(1, −7)
c.
(−1, 5)
d.
(−2, 4)

Multiplying an even number of negative numbers gives an answer that is choose from:

Joseph haydn pet store offers wide variety of leashes for dogs. the store purchases one popular type of leash from its manufacturer for $4.38 each. joseph haydn pets marks up leashes at a rate of 238% of cost. what is the retail price of the popular leash?

Ataxi company charges $2.25 for the first mile and then $0.20 per mile for each additional mile, or f = $2.25 + $0.20(m - 1) where f is the fare and m is the number of miles. if juan's taxi fare was $6.05, how many miles did he travel in the taxi? if juan's taxi fare was 7.65, how many miles did he travel in taxi