It is the first statement. It is positive two, so it’s above sea level. We can immediately get rid of the last two statements. Then, it is negative 20. The is 18 feet below sea level, because 2-20 is -18. Positive 8 shows rising up by 8 feet. The correct statement is the first one.
Put the values of the variables in place of the variables in the expression, then do the arithmetic.

<span>Hello there.
What is the equation for x+1, x+2, x+3
</span><span>4x</span>+<span>3</span>