Which statement best explains why the sum of the areas of the two white squares in Figure 2 is the same as the area of the white square in Figure 1? a) In each triangle, the length of side a plus the length of side b equals the length of side c. That means that a^2 + b² = c^2.
b) In each figure the total area is equal and the area of the 4 triangles is equal, so the remaining white area in each figure must also be equal.

c) The combined area of the four triangles is equal to the area of the large white square. Tumble

Suppose we have a set of small wooden blocks showing the 26 letters of the english alphabet, one letter per block. (think of scrabble tiles.) our set includes 10 copies of each letter. we place them into a bag and draw out one block at a time. (a) if we line up the letters on a rack as we draw them, how different ways coukl we fill a rack of 5 letters? (b) now suppose we just toss our chosen blocks into a pile, and whenever we draw a letter we already have, we put it back in the bag and draw again. how many different piles of 5 blocks could result? possible? piles will contain at least one repeated letter? (c) if we draw out 5 blocks wit hout looking at them, how many different piles are (d) if we draw out 5 blocks without looking at them, how many of the possible 2. (4) consider the following formula. 12 give two different proofs, one using the factorial formulas and the other combina torial.