800-450=350, 350+100=450, 450-210=-240. The submarine is now positioned at 240 ft below sea level..
Answer:x=7, y= 8
Step-by-step explanation: y= x+1, put in 2nd equaiton to get, -7x + 6x+6 =- 1, -x = -7, x=7. -7+y=1 ,y=8
Nearest hundredth means 2 decimal places, so 76.70
