Solve the system of equations using gaussian elimination or gauss-jordan elimination.

1. 2x+y=1

3x-6y=4

2. 5x-3y=-2

4x+2y=5

What word could be used to describe 3/x in the expression 3/x + 8

4b + 8 = 56 46 + 0 = 48 46 = 48 A. add 4 to both sides B. multiply both sides by 4 C. divide both sides by 4

8. What is the surface area of a piece of pipe that is open at both ends, has a diameter of 4 ft, and has a height of 12.5 ft? (a) 100 square feet (b) 157 square feet (C) 182 square feet (d) 314 square feet

X over negative 10 equals 7

Is 9r+16=π/5 a literal equation?

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.