I need help with this math problem

9

Step-by-step explanation:

Perpendicular lines have negative reciprocal slopes. The green line and red line are perpendicular. We know the slope of the green line is -1/9, so we must find the negative reciprocal of -1/9.

Negate

Negate the slope of the green line

-1/9--> 1/9

Reciprocal

To find the reciprocal, flip the numerator and the denominator

1/9--> 9/1

So, the slope of the red line is 9/1, which is equal to 9

81 seats

step-by-step explanation:

if you multiply 0.65 times 125 then you get 81.5 seats. well since you can't have half of a seat you have to round down and get 81 seats in the no children zones. that leave 44 seats outside of the no children zone.

$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