alicia conducted an experiment to find out which insulating material holds in the most heat. she did multiple trials of each test and recorded observations of each trial.

why did alicia most likely do more than one trial? check all that apply.
to increase the reliability of her data
to provide a better understanding of the concepts she investigated
to prevent other people from using the data incorrectly
to in arriving at a conclusion even with inaccurate data
to reduce the likelihood of errors in the experiment

it cools slower in the earth meaning the crystals have more time to form than lava on the surface

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.