Jeffery has a collection of marbles. He gives his best friend 36 marbles from the collection for his birthday. This represents 30% of Jeffery's total collection. How many marbles did Jeffrey have in his collection?

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.

2x minus y equals 6, x plus y equals negative 3

If rs 900 amounts to rs 1044 in 4 years, what sum will amount to 1368 in 3 1/2 years at the same rate