4. Nico Joven presently earns $348.40 per week. He claims himself and his mother as allowances. He is single. He is to get
a new job classification, which will result in a 15% increase in
pay. He also plans to marry. After his marriage, he will claim
his wife, himself, and his mother as allowances. How much
less will be withheld weekly for federal income tax?

answer: -2+√x,-2-√x

i hope this , i don't know if you're looking for a pair or not.

there is no grid

step-by-step explanation:

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0

the answer is b.

64

step-by-step explanation:

c=2πr=2·π·8≈64