Math no guesses how do u solve it plz the first figure of the sierpinski triangle has one shaded triangle. the second figure of the sierpinski triangle has three shaded triangles. the third figure of the sierpinski triangle has nine shaded triangles. which summation represents the total number of shaded triangles in the first 15 figures?

  see below

Step-by-step explanation:

You want terms that have a common ratio of 3, so the term in the summation will be 3 to some power. Only the first expression matches that requirement.

You can try different values of n to see if they fit the problem description.

  n = 1: 1(3)^0 = 1(1) = 1

  n = 2: 1(3)^1 = 1(3) = 3

  n = 3: 1(3)^2 = 1(9) = 9 . . . . . the third triangle in the set has 9 shaded triangles, as this expression predicts. Thus, we see the problem description being matched by the first answer choice shown.

$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

4+4+2x

or

2x+8

step-by-step explanation: