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So what I would do first, would be to write the probability of chosing each counter out of the  bag. For example red is 3/6 => 1/2, green is 2/6 => 1/3, and blue is 1/6.

Then 5a => 1/6 is ...

look for common factors but there are not any in this case, it is a quadratic with 3 terms therefore it can be factorised into 2 brackets. First we look at the first term, since 7 is a prime number you ca...

2 + 3 + 7 = 12

6000/12 = 500

7 x 500 = 3500

(3/5) x (3500) = 2100

2100 + 2(500) = 2100 + 1000 = 3100

(3100/6000) x 100 = 52%.

(m+3)(m+10)

m² + 3m+ 10m + 30

m² +13m+ 30

(2x+9)² = (2x+9)(2x+9) Use FOIL to expand these brackets: First - (2x+9)(2x+9) --> 4x² Outside - (2x+9)(2x+9) --> 4x² + 18x Inside - (2x<...