What is the constant of proportionality indicated in the table below?
x y
5 7
10 14
15 21
20 28

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)

Ican interpret and represent the remainder in division calculations sensibly for the context (eg 27.4 in calculating average height in cm: $27.44 if it represents an amount of money) solve the following problems. 15) the wildlife park charges $25.50 dollars per person to enter their park if the park made $15096 dollars today, how many people entered the park? 16) ms adams plus 2,230 other keen runners ran a marathon: between them they ran 94817.5km. how many km did each competitor run?

Which expression represents the total perimeter of her sandwich, and if x = 1.2, what is the approximate length of the crust?