the answer is 50-1 40+9
Answer:
its the 4 one
Step-by-step explanation:
58
The submarine is below the sea level by 40 meters. Then, it goes up by 12. That means 40-12=28. The submarine goes 30m down again which means 28+30=58
(3,-7)
Using the algebraic rule for Rx-axis
(x,y)---->(x,-y)
(3,7)--->(3,-7)