For questions 18-20, determine if ab and cd are parallel, perpendicular, or neither.
18. a(-4, 3), b(2, -12), c(10,5) and d(0, 1)
19. a(2,3), b(8,-15), c(-2, 2) and d(-5, 11)
20. a(5,6), b(-1,6), c(-2, -7) and d(-2,-4)
perpendicularly or neither

40% off the regular price is the correct answer.

step-by-step explanation:

10 b/c 5*2 =10

step-by-step explanation:

$3720

step-by-step explanation:

taxable income = $31000

as per the 2018-2019 us tax bracket, the tax rate is 12% for an individual whose taxable income is between $9,526 to $38,700.

so, the tax to be paid by him = 12% of 31000

= 0.12 * 31000     [12% converted to decimal as 0.12]

= $3720

question 1: step-by-step explanation:

1/4 of 84 = 84÷4= 21