16x - 10x + 9 = 99 - 30
6x + 9 = 69 so 6x = 60 or x = 10
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16x - 10x + 9*99 - 30 = 6x + 861
30 + 5x = 15 + 10x 30 = 15 + 5x 15 = 5x x = 3
9 degrees
y=x2-10x+30=(x-5)2-25+30=(x-5)2+5
4x + 2(3x) = 30 10x = 30 x= 3. Y= 9. (3,9)