We can say that lines A and D are <em>perpendicular</em>.
2 pages per hour.
the fractions can be turned to decimals easily, 4/5 is 0.8 and 2/5 is 0.4 . divide those decimals together and you get 2.
2x+4x-4=2+4x
2x+4x-4x=2+4
2x=6
x=3
25-x=15-3x-10
3x-x= 15-10-25
2x= -20
x= -10
4x=2x+2x+5x-5x
2x+2x+5x-5x-4x
0 . no solution
7 = 2n - 2
n= a number so twice a number is 2n and 7 is 2 less than twice this number.
0.00100037227 will be your correct answer.