Cuanto es 174 dividido en 3?

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

Can someone me do math because i am having a breakdown rn because i don’t get it

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