**10 + 2p**

**increases by means addition **

**product means multiplication **

**Answer:**

6√5

**Step-by-step explanation:**

√15 x √12

=√3x √5 x 2 x √3

=3 x 2 x √5

=6 x √5

=6√5

When you add a positive and a negative like you did here it basically is the same as subtracting 5 from 3

Answer:

Step-by-step explanation:

Since 15 liters of water flow through a water pipe and enter a tank within 4.5 minutes, the same amount of water would flow through a similar pipe at the same time. Therefore, if two similar water pipes are used, the volume of water that would flow into the tank in 4.5 minutes is 15 × 2 = 30 liters

Therefore, the time it will take to pump 727.5 liters of water into a water tank using 2 similar water pipes is

(727.5 × 4.5)/30 = 109.125 minutes