With regard to mathematics, what is in excepted statement of fact that is used to prove other statements

Axiom

Step-by-step explanation:

This is called a axiom. Not too sure if you mean the the definition but this is the definition.  Hope this helped c:

$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

the answer should be a. snail