Answer:
Step-by-step explanation:
30*20%= 6 so $6.00 tip
Total with tip is $36.00
Your answer:
<span>Equation:
x(x+1) = 2(x+1)+77
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x^2+x = 2x+79
x^2-x-79 = 0
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This quadratic does not have an integer solution.</span>
First, note that x+21 and 3x+9 are "complementary angles;" they add up to 90 degrees. Thus, 4x + 30 = 90 degrees, so that 4x = 60 degrees, and x = 15 degrees.
The product of the slope of perpendicular lines is always -1
