-10 + 20 = 10 is the value
Answer: $440
Steps:
Retrace the math. Your total at the end was $22.00, before that you had a 10% tax so you multiply the tax in order to retrace that step. Next, multiply is by 2 as the 50% discount which gets you to $440
no 1 really knows but scientists believe that the Earth was formed 3-3.5 billion
0.87 is 87/100 does 87 and 100 have any common factors ? Nope so it's 87/100
