X + 3y – 2z = 3
-x – 2y + z = -2
2x – 7y + z = 1

Use Gaussian Elimination to solve.

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

Which expression is equivalent to 3^3 + 2^2?