HELP! I don't understand this, thank you so much for your help in advance!

Two parallel lines are crossed by a transversal. what is the value of x? x = 40 x = 70 x = 110 x = 130

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax