There are 21 students participating in a mathematics competition. how many ways can the students who go first and second be chosen?

Y= a(x-3)squared-1 what is the value of a

4. a single woman uses an online cash flow calculator which reveals a cash flow of 203. what does this mean?

Lesson 9-3 for items 8-10, a square is drawn in the coordinate plane, with vertices as shown in the diagram. then the square is reflected across the x-axis. -2 4 8. the function that describes the reflection is (x, y) - a. (x, y-3). b. (x, y-6). c. (-x, y). d. (x,- y).