4(-1)-2 = -4-2 = -6 i hope this help
P is the point (2,k)
PA = PB
PA = √(49 + (2-k)²) and PB = √(1 + (6 - k)²)
√(49 + (2-k)²) = √(1 + (6 - k)²) => (49 + (2-k)² = (1 + (6 - k)²
=> 49 + 4 - 4k + k² = 1 + 36 - 12k + k² => 8k = 37 - 53 = -16 => k = -2
90 dimes = $9 because 10 dimes = $1
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5 multiplied by .3 is 1.5
1.5 + 18.5 = 20.
y = 9.25