**Answer:**

10 hours

**Step-by-step explanation:**

**Given:**

Average speed of submarine = 10 mph

Speed of carrier in the opposite direction = 20 mph

Distance between the submarine and carrier = 300 mi

**To find:**

The time taken so that the distance between them is 300 mi ?

**Solution:**

The relative speed when they are traveling in opposite direction = 10+20 = 30 mph

Formula:

So, the answer is <em>**10 hours**</em>.

**Answer:**

y < -11

**Step-by-step explanation:**

First you would subtract 4y from both sides, leaving you with 4y + 2 < -22. Then you would subtract 2 from both sides leaving you with 4y < -44 because when you subtract 2 from -22 you have to change the 2 to negative and the subtraction to addition. So, then you divide 4 on both sides leaving you with... y < -11, because if you divided -44 by 4 you get 11, but its negative so, it would be -11.

**Answer:**

40

**Step-by-step explanation:**

I answered by simply looking at the equation

**Answer:**

751

**Step-by-step explanation:**

998-247=751