Line A: y = 1/5x+2 Line B: y = -1/2x + 7
Line C: y = -2x + 4
Line D: y= 1/2x+5/4
Which lines are perpendicular?
A)
A and B
B)
A and C
0
B and C
D)
A and D

the answer is mp

step-by-step explanation:

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.