John had been saving quarters and dimes to buy a new toy. he had 103 coins and saved $21.40 . how many quarters did he save? quarters=0.25
dimes=0.10

Prove that quadrilateral is a rhombus.

Find the value of x. give reasons to justify your solutions! l, m ∈ kn

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?