How many unique ways are there to arrange the letters in the word OPAL?

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

Which compound inequality could be represented by the graph?

For the chance to be team captain, the numbers 1-30 are put in a hat and you get two chances to pick a number, without replacement. which formula correctly shows how to find the probability that you choose the number 1 and then 2?