Bone fractures in which the bone protrudes through the skin are called
(a) greenstick fractures.
(b) compound fractures
(c) simple fractures.
(d) stress fractures.

The correct answer will be- compound fracture.

Explanation:

Bone fracture is the breaking of bone due to accidents, sports injuries, falls, osteoporosis and low bone density.

The fracture should be of various types depending on the degree but a type of fracture where a fractured bone protrudes out from the skin is known as an open fracture or compound fracture. The open fracture can also be a case of a medical emergency as it could lead to osteomyelitis, a type of bone infection.

Thus, the compound fracture is the correct answer.

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.