What is 948 times 7 and what is the estimate

Solve for n? [tex]z = \frac{3}{4} mn[/tex]

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

Complete the equation of the live through (-1,6) (7,-2)