5. (HS-LS4-2) Sickle cell anemia is an inharited illness that is caused by a mutation in the hemoglobin gene that leads to abnormally shaped blood
cells. These blood cells are not able to properly transport oxygen. Carriers
(heterozygotes) of this trait are resistant to a deadly disease called malaria,
that is spread by parasites. Malaria is a common disease in Africa. Based on
the information provided, why do you think sickle cell anemia is more
common in Africa, even though it is such a deadly illness?

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; motor (efferent)neurons;