17) What is the slope of a line perpendicular to the line y = 2x - 3? OA) -2.
OB) 1/2
OC) -1/2
OD 2

C.) -1/2

Step-by-step explanation:

Perpendicular lines have opposite reciprocal slopes.

Therefore, the slope of a line perpendicular to the line y = 2x - 3 must be -1/2.

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.