3ab+2 x -a =2c a=2 b=3 c=7 True or False

Which of the following are accepted without proof in a logical system? check all that apply.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

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