How do you find the slope for example; y = -5x - 1HOw do you find the slope i'm so confused

Which expression is equivalent to? assume x > 0 and y > 0.

Find the least common denominator for thesetvo rational expressions.n^2/n^2+4n+4 -3/n^2+7n+10

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? $$