Find the final balance in an account with $820 invested at 4% annual simple interest for three years

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu