Pratik was performing an experiment to test for the presence of starch and
glycogen in different types of foods. He treated four food samples with a Lugol's
iodine reagent. This solution is brown-yellow, but it produces a blue-black color
when it reacts with starch and a brown-blue color when it reacts with glycogen.
Which samples would test positive for starch or glycogen in this
experiment? Select all that apply.
Banana
Table sugar
Liver
Potato flakes

answer-

the statement that f(x) = |x+a| + b has exactly one x-intercept is sometimes correct.

solution-

it solely depends on b, whether the function will have one or two or zero x intercept.

this plot of the given function, f(x) = |x+a| + b will be the basic absolute value graph i.e v shape, with vertex translated to (-a, b), instead of origin.

1-   if b is zero, the graph will have exactly one x-intercept, at x= -a

2- if b is positive, the whole graph will be above the x-axis, hence it will have no x-intercepts.

3- if b is negative, the graph will be below the x-axis, hence it will have two x-intercepts.

∴ the statement is sometimes true.

answer; cnidarians;