Expressions for consecutive triangular numbers are 0.5n(n + 1) and 0.5(n+1)(n+2)
Prove that the sum of two consecutive triangular numbers
is always a square number.​

An equation representing lyle’s hedge-trimming business is a = 12n - 300 where a is the amount of profit or loss in dollars and n is the number of hedges trimmed. how would the graph of lyle’s business change if the equation a = 10n - 300 represented his business? the graph would be flatter. the graph would be steeper. the graph would start closer to the origin. the graph would start lower on the y-axis.

Which best explains why this triangle is or is not a right triangle?

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