Emma bought yard of striped ribbon and yard of solid ribbon. Which kind of ribbon did she buy more of?

Abcd is a parallelogram find the valuse of x

What signals you that factoring by grouping is the best method to use when factoring a problem?

(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