Is this correct? Sb please help me

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a