Oliver bought 8 bags of marbles. There we're 7 green and 7 blue in each bag. How many marbles did he buy in total? use the doubles strategy to show your work.

The product of two negative rational numbers is always zero sometimes zero never zero

(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100

Write the expression 7x^3-28xy^2 as the product of 3 factors