Answer:
6(x^2-3)
Step-by-step explanation:

that said, check your calculator for a button of [ ₙCᵣ ], and you can use that as well.
They are similar. I don't remember what it is called but it is 100% ALWAYS true that the angles of a triangle must add up to 180 degrees. Always. If you have two angles, that are 60 degrees, the other must always be 60. again, always. So, They are similar by their angles.
Answer:
$133.33
Step-by-step explanation:
When dealing with such a problem we can use the Rule of Three. This rule is basically used in order to find the missing value when dealing with a ratio. Like so...
12% of final price <======> $16
100% of final price <=====> x
Now we multiply the two available diagonal values together and divide by the last value in order to get the value of the variable, which in this case would be the original price in dollars
(100 * 16) / 12 = x
1600 / 12 = x
133.33 = x
Finally, we can see that the original price of the item was $133.33