If b is the midpoint of ac, ab=x+6 and ac=5x-6 then what is bc

Triangle jkl was dilated using the rule dm, 1/3 the image, triangle j’ k’ l’ is the result of the dilation. a.5 units b.7.5 units c.10 units d.12.5 units

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319

Which expression is equivalent to -12(3x-3/4)