7∙ 15 can be written as

a: 5(7 + 10)
b: 10(7 + 5)
c: 7(10 + 5)

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 you answer 2+2 you will get over 80 points

The measure of an angle is 117°. what is the measure of a supplementary angle?