I need help with this

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

Olive's solar powered scooter travels at a rate of 30 miles per hour. what equation can she use to calculate her distance with relation to the time she traveled? h=hours m=miles 1. h=m+30 2. m=30h 3. m=h+30 4. h=30m

Adele is five years older than timothy. in three years, timothy will be 2/3 of adele’s age. what is adele‘s current age?