Aplastic toy submarine is held 15 centimeters below the water surface in a bath tub . the submarine is let go and rises 15 centimeters . what integer represents the toy submarine’s position with respect to the surface of the water ?

0  

Step-by-step explanation:

The starting point, the surface of the water, is zero.

If you go down 15 cm and then up 15 cm. you are back to where you started.

You are at the zero level, so the integer is 0.

4+n=5

step-by-step explanation:

this is because the four is four hours and the n represents the 1 extra hour over the weekend.

b= i'm srry i don't know that one.

4+n=5 n=1 because if vernon plays 5 hours a week then 4+1=5 hours.

hope this : )