Select the correct answer.
Simplify the following expression.

5^-5/2 x 5^9/2
A.) 625
B.) 5
C.) 1/25
D.) 25

Classify the following triangle check all that apply

Lee has $1.75 in dimes and nickels. the number of nickels is 11 more than the number of dimes. how many of each coin does he have?

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total