The number of hamburgers H sold and the dollar amount of sales S taken in. what is the independent variable and what is the dependent variable?

#12 find the value of x. #13 find the value of the variable.

What is the range of the data below? .8090100

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