Elena says that 25 cm is equal to 250mm. Do you agree? Why or why not?

Which of the following expressions is equal to 2x^2+8

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.