Please help tysm guys <3 make sure to put what question ur answering if ur doing one tysm!

Add 1/7 + -1/7 your answer should be reduced to its smallest form and should not be an improper fraction

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$

If f(x) = 3x2 - 2x+4 and g(x) = 5x + 6x - 8, find (f-g)(x).