The third choice, 4x²+18x+0.25=0, is correct.
The frame will have the same thickness on both sides of the mirror. Therefore we add 5+x+x to get the total length, and we have 4+x+x to get the total width.
The area is found by multiplying the total width and total length:
A=(5+x+x)(4+x+x)
A=(5+2x)(4+2x)
Multiplying the binomials, we have:
A=5*4+5*2x+2x*4+2x*2x
A=20+10x+8x+4x²
A=20+18x+4x²
We know that the area is 19.75:
19.75=20+18x+4x²
We need quadratics set equal to 0, so subtract 19.75 from each side:
19.75-19.75 = 20+18x+4x²-19.75
0=0.25+18x+4x²
In standard form, it will be:
4x²+18x+0.25=0
Answer:
7 is median, 1 is minimum, 12 is maximum, 11 is upper quartile, 2 is lower quartile
a) Aiden's taxable income is $50,450.
The taxable income is equal to the gross income minus the standard deduction.
= $50,450 ($63,000 - $12,550).
b) Aiden's marginal tax rate = 22% (for taxable income falling under the income bracket of $40,526 to $86,375 for the tax 2021 year. It is assumed that Aiden is single.
c) Aiden's effective tax rate = 13.72%. The effective tax rate = total taxes due divided by Aiden's taxable income.
= 13.72% ($6,922/$50,450 x 100)
Related links on taxable income at brainly.com/question/1160723
17/100 is the same as 17÷100. 17÷100 =0.17 sqr mile.
OR 17/100, the denominator means what place it is in. The denominator is100, so it's in the hundredth place. 0.17
