Each day ,steven walked 1/2 mile more than the previous day. the first day he walked 1/2 the second day he walked 2/12, the third day he walked 3/12 mile. on which day did the sum of his walks total at least 1 complete mile?

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

For the equations below which statement is true ?

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