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(C) x² - 4x + 5 = 0

Step-by-step explanation:

   x = 2 ± i

⇒ x = 2 + i             and       x = 2 - i

⇒ x - (2 + i) = 0     and        x - (2 - i) = 0

 0 = (x - 2 - i)(x - 2 + i)

     = x(x - 2 + i)   -2(x - 2 + i)   -i(x - 2 + i)

     = x² - 2x +xi   -2x + 4 - 2i   -xi + 2i - i²

     = x² - 4x + 4 - i²

     = x² - 4x + 4 -(-1)

     = x² - 4x + 5

B

Explanation:

The slope from (0, 0) to (1, 4) is a rise of 4 and a run of 1, thus, m = 4/1 = 4

lockers 1, 4, 9, 16, 25, 40, and 49 are open

i ran through it by the other answer is wrong

80 the answer is 80

step-by-step explanation: