Jake has a pocket full of dimes and quarters. the total value of his change is $2.05. let d d represent the number of dimes, and let q q represent the number of quarters in his pocket. write a linear equation in standard form to represent this situation.

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

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

Ten members of balin's soccer team ran warm ups for practice. each member ran the same distance. their combined distance was 5/6 of a mile. to find the distance that each member ran, balin wrote the expression below.