Find the sum of 7x^2 + 3 and 4x^2 -5?

g

step-by-step explanation:

what level of math? also i don't need to be paid if i can you.

$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