What is the value of x for the following system of equations?

15x-12y=13

30x+9y=4

A tree casts a shadow 12 meters long, while a bush nearby casts a shadow 3.5 meters long. If the tree is 3.2 meters tall, how tall is the bush?

Another customer purchases a pack of gum for $1.25 and a candy bar for $1.10, what is the total of these two items before tax?

26, 21, 27, 33, 24, 29 Range:

The minimum wage in 2003 was 5.15 this was w more than the minimum wage in 1996. write an expression for the minimum wage in 1996

An airplane 28,000 feet above ground begins descending at a constant rate of 2,000 feet per minute. Which equation gives the height of the airplane after m minutes?

Christian sold tickets to game. Good seats were $5 each poor seats cost $2 each. 210 people attended and paid $660. Write a system of linear equations that can be used to find how many good seats and how many poor seats were sold.

Mrs Baker is preparing her students for their exams. The exams are two weeks away. Mrs Baker advises her students to spend 25% of each day revising.

Which number produces a rational number when multiplied by 1/3

What is the constant of 6y=8x?

Which description could be written as a linear function?