Read the real-world problem.
jonah wants to buy two copies of a book.
which algebraic expression could jonah use to find the value of the items?

a.
2b

b.
b • b

c.
b + d

d.

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.