Which of the following is not a Pythagorean Triple? a)20, 21, 29
b)7, 14, 25
c)12, 16, 20
d)8, 15, 17
e)15, 36, 39

Phillip had some bricks. he stacked them in 6 equal piles. which expression shows the number of bricks phillip put in each pile? let the variable m stand for the unknown number of bricks. m + 6 m÷6    m−6    6m

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What is the expression in factored form? 225x^2 - 144 a. 9(5x+4)^2 b. 9(5x-4)^2 c. 9(4x+5)(4x-5) d. 9(5x+4)(5x-4)