SOMEONE DO NUMBER 13 AND 14 FOR ME ASAP

Solve the system of equations. y= 2x y= x^2 - 15

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.

Simplify 24÷(-2)(3)+7 a. -29 b. 3 c. 11