A television advertisement claims that a certain brand of cough drop reduces coughing for 8 hours.
Describe an investigation that could be used to determine if this claim is
valid. In your answer, include at
least a description of:
• the treatment to be given to the experimental group
• the treatment to be given to the control group
• the data to be collected
• when the data should be collected
• one observation that would lead to the conclusion that the claim is valid

the fossil record provides evidence of a common ancestor to many species.

the answer is c. it will give up it's valence electron to the other atom.

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.