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44. h(x) = px + q
h(2) = 2p + q = 1
h(4) = 4p + q = 5
h(10) = ?
2p + q = 1
4p + q = 5
-------------- -
-2p = -4
p = 2
2p + q = 1
4 + q = 1
q =-3
h(x) = 2x - 3
h(10) = 20 - 3 = 17
45. f(x) = x^2 + bx - b
f(3) = 9 + 3b - b = 19
(b+1)/2 = ?
9 + 3b - b = 19
2b = 10
b = 5
(b + 1)/2 = (5 + 1)/2 = 6 / 2 = 3