Which of the following equations can be used to find the length of EF in the triangle below?
24
D
12
F
O A. (EF)2 = 242-122
B. EF = 24 - 12
C. EF = 24 + 12
D. (EF)2 = 242 + 122

Timed***how else can the sequence for row 1 be written? notice: square a: 1 penny = 20 square b: 2 pennies = 21 square c: 4 pennies = 22 the sequence formed is geometric, with a1 = , and common ratio r = .

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Find the distance between the pair of points a(-1,8) and b(-8,4)