**Answer:**

(x+y+z)(a+3)

**Step-by-step explanation:**

ax+ay+az+3x+3y+3z

=(ax+ay+az)+(3x+3y+3z)

=a(x+y+z)+3(x+y+z)

**=(x+y+z)(a+3)**

**Answer:**

The kinetic energy is 20,000\ J

**Step-by-step explanation:**

The kinetic energy of a body is defined as:

Where <em>m</em> is the mass of the roller coaster car

<em>s</em> is the speed and <em>k</em> is the kinetic energy

We know that

Then the kinetic energy of the roller coaster car is:

**Answer:**

$319.60

**Step-by-step explanation:**

Normal Game console cost : $399.50

Discount: %20 (0.20)

$399.50×0.20= $79.90

Total cost of discount $79.90

$399.50-$79.90= $319.60

New cost after Discount= $319.60

**Answer:**

20%

**Step-by-step explanation:**

Formula:

((GreaterTime-LeastTime)/Greatertime)x100= Percentage of Decrease.

((30-24)/30)*100=percent of decrease.

(6/30)*100=percent of decrease.

0.2*100= percent of decrease.

20%.

Hope this helps you :D

**Answer:**

13 and 30

**Step-by-step explanation:**

the smaller of the two numbers is 13.

If there is a 17 number difference, then that means that the second number is 30.

give brainliest, please!

hope this helps :)