MAIN IDEA: CARBON ATOMS HAVE UNIQUE BONDING PROPERTIES. Choose whether the statement is true or false.
1. true / false Carbon atoms form the building blocks of most living things.
2. true / false Carbon’s outer energy level is full.
3. true / false Carbon atoms can form covalent bonds with up to four other atoms.
4. true / false The three basic structures of carbon-based molecules are straight chain, bent chain, and ring.

i am not sure

true/false/true/true

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.

its b. greenhouse gasses trap uv rays for heat so that the plants stay alive.