Which statement best describes f(x) = -2√x - 7 + 1?

a. -6 is in the domain of f(x), but not in the range of f(x).
b. -6 is not in the domain of f(x), but is in the range of f(x).
c. -6 is in the domain of f(x), and is in the range of f(x).
d. -6 is neither in the domain of f(x), nor in the range of f(x).

b.-4 units

all you   do is count how many times you move

step-by-step explanation:

one of the most important purposes of surface treatment is to alter surface properties according to the requirement of specific applications. for example, hydrophobic coating has been utilized on windshield and eyeglasses. gold atom monolayer on substrate has become a popular surface bioconjugation strategy.  

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4