Solve the system of linear equations. What is the value of y?

9x-6y=15

6x+21y=60

The sum of a number and five is twenty. How do I write this?

If the beginning temperature was - 13 degrees at 5:00 a. m. what was the temperature at 9:00 a. m

To protect themselves from extreme hot or cold temperatures American alligators dig burrows in the mud suppose there are 20 alligators each with 50 feet of burrows what is the total length of all the burrows?

Mrs. Clark wants to plant rose bushes along the front of her house. The length she wants to cover is 13 feet, and she wants to allow at least 2 feet for each rose bush. If rose bushes cost $17, about how much money will she spend on rose bushes?

Sebastian and Amy both ride from their homes to the park from the Park to Amy's home it is 3 miles from the Park to Sebastian's home is 3 miles as well if they both start at the same time in ride at their current rate how long will one have to wait

What is the monthly payment for $280000 mortgage with an interest of 6% compounded monthly for 20 years?

Round 8.61 to the nearest tenth

Expand these expressions, 11 (2x + 11), 2 (3n - 4.5) and, 3 (6x - 9).

Jolene plans to paint the outside of a building block that has an edge length of 2.7 cm. How much area will be covered with the paint?

What is prime number