a bag contains only red bricks and blue bricks. there is a total of 20 bricks in the bag. the probability that a brick taken at random from the will be red is ⅖. how many blue bricks are there in the bag.

there is 12 blue bricks

Step-by-step explanation:

if you have 2/5 and the denominator needs to be 20 because there is 20 bricks in all you multiply 5 by whatever number to get to 20 in this case its 4 then if you multiply the denominator by 4 you have to multiply your numerator by 4 making it 8/20 then you subtract 8 from 20 because ow you know how many red bricks there are and if you subtract that gives you 12.

hope this helps :)

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0

answer: your answer is a