Which matrix equation represents the system of equations?

x+y=5
x-2y=-4

  see below

Step-by-step explanation:

The variables are listed top down in the variable vector in the same order as the coefficients are listed left-to-right in the equations. Each of the equations needs to have the variables listed in the same order.

nope.   happens to me as well.

-aparri

$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