The ratio of the number of boys, b, to the number of girls, g, in the class with S students is 3 to 5. The total number of students in the class can be calculated using the expression S=b+g. Part A: Write an expression which represents the number of students in the class, S, in terms of the number of girls, g. Part B: What percent of students in the class are girls?

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

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

Solve x+3y=6 and 4x-6y=6 by elimination . show work !