Geometry and Algebra Problem Solving

In problem 37, what is the value of xy - yz when y = 2 and x - z = 5?

In problem 37, which statement(s) are sufficient to determine the value of xy - yz?

In problem 38, what is the main reason the statements are insufficient to determine if the books fit?

In problem 39, what additional information is needed to calculate the surface area of the painted band?

In problem 40, what is the value of n if 2 to the power of 2n equals 16?

In problem 40, why is the first statement alone not sufficient to determine the value of n?

In problem 41, how many cans fit along the length of the carton if each has a radius of 4 cm?

In problem 41, what is the total number of cans that can fit in the carton?

In problem 41, which statement(s) are sufficient to determine the number of cans that fit in the carton?

In problem 41, what is the diameter of each can if the radius is 4 cm?