Form a "triangle" with 10 blocks in its top row, 9 blocks in the next row, etc., until the bottom row has one block. each row is centered below the row above it.

color the blocks in the top row red, white, or green (or any three colors of your choosing) in any way. use these two rules to color the remaining rows of the triangle:

- if two consecutive blocks in a row have the same color, the block between them in the row below has the same color

- if two consecutive blocks in a row have different colors, the block between them in the row below has the third color

tell how you can always predict the color of the bottom block after seeing only the top row (and not constructing the intermediate rows) prove your answer.

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First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )