89 points! hurry within 2 minutes. jered's parents are going to repaint their house. they need to select two colors to complete the job. if they previously narrowed their decision down to six colors, how many combinations of two can they choose from?

The formula for combinations is n! / (r!(n-r)!)

where n is the total number of objects and r is the sample.

So you get 6! / (2!(6-2)!)

The ! means you multiply the number by all numbers below it

so 6! = 6 * 5 *4 * 3 *2 *1  = 720

2! = 2*1 = 2

6-2 = 4, 4! = 4 * 3 *2 *1 = 24

Now you have 720 / 2 * 24 =

720 / 48

Answer = 15 possible combinations.

180

step-by-step explanation:

12-2=10

20-2=18

18x10=180

d, x=8

step-by-step explanation:

simplifying

4x + -5 = 2x + 11

reorder the terms:

-5 + 4x = 2x + 11

reorder the terms:

-5 + 4x = 11 + 2x

solving

-5 + 4x = 11 + 2x

solving for variable 'x'.

move all terms containing x to the left, all other terms to the right.

add '-2x' to each side of the equation.

-5 + 4x + -2x = 11 + 2x + -2x

combine like terms: 4x + -2x = 2x

-5 + 2x = 11 + 2x + -2x

combine like terms: 2x + -2x = 0

-5 + 2x = 11 + 0

-5 + 2x = 11

add '5' to each side of the equation.

-5 + 5 + 2x = 11 + 5

combine like terms: -5 + 5 = 0

0 + 2x = 11 + 5

2x = 11 + 5

combine like terms: 11 + 5 = 16

2x = 16

divide each side by '2'.