Val's submarine was 400 yards below the surface or the water at 4:00 p. m. By 8:00 p. m. it had risen 300 yards. If the surface of the water is 0, which integer represents where Val's submarine was at 8:00 p. m.

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Step-by-step explanation:

answer: he is 272195

step-by-step explanation: all you have to do is multiple 3535 and 77 and it equals 272195

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!