answer: no real solution
x^2 - 6 + 9 = 0
step 1: simplify both sides of the equation.
step 2: subtract 3 from both sides.
step 3: take square root. x=±√−3
answer is no real solutions.
third inequality has dashed boundary.
an equality has dashed boundary on graphing when it strictly less than or strictly greater than symbolically ( < or > sign in the inequality)
boundary line is is solid line when the inequality is with symbol of equality also ( < = or > = )
here we can see that all the inequalities except third one has symbol less than or equal to or greater than or equal to . and third inequality is with
symbol > (greater than ) that mean strictly less than ,therefore on graphing
third inequality gives dashed line boundary.
the answer is b. 5 x 107 m. i did the test.