Amy is three times as old as Jacob. If four years ago the sum of their ages was one hundred , how old are they now ?

15 point ! ~ see if you know the answer to both you!

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i

Alex took his brother to a birthday party. the party was scheduled to last for 1 and 3/4 hours but they stayed for 4/5 of an hour more. how long did she stay at the party?