There is a bag with only red marbles and blue marbles. The probability of randomly choosing a red marble is 1/9
There are 45 marbles in total in the bag and each is equally likely to be chosen.
Work out how many red marbles there must be.

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

1. evaluate 8x(2)y9(-2) for x=-1 and y=2 2. simplify the equation. -() 3. simplify the expression. [tex]\frac{5}{x(-2) y9(5)}[/tex]