Since you didn't tell us where and what your difficulties are I can give you only hints whatyoushould and can do.

Convert billions into millions and divide afterwards popX by popZ1.) The population of country X is 0.36 billion persons, and the population of country Z is 12 million persons. The population of country X is how many times that of country Z?

Convert x pounds into ounces and divide this value by 40.2.) The 40 eggs in a box weight a total of x pounds. What is the average weight per egg for the eggs in the box, in ounces? a) x/640 b)56/x c)56x d)2x/5

Use the Pythagorean theorem. Make sure that you know which side of the triangle is the hypotenuse. (That's the longest side of a right triangle)3.) Shows a right triangle: side a=x side b=4 side c=w

What is x^2 in terms of w?

Draw a sketch. Read the new coordinates from your drawing.4.) Shows a graph with a line segment with the coordinates a(1,1) and b(4,4)

If line segment AB is flipped over the x-axis such that point A becomes point C and point B becomes point D. What are the coordinates for C and D?

Draw a sketch. You should notice that one side of the triangle is the sum of two of the three radii.4.) It shows three circles with one triable that goes through all three of them and they are arranged in such a way that the sides of the triangle makes up the radius of each circle. The problem reads:

Each circle is tangent to the other two circles. The points X, Y , and Z are the centers of the circles. If the circles have radii of 3, 4, and 5, respectively, what is the perimeter of triangle XYZ?

There are three possible cases: X > Y, X = Y, X < Y5.) P=XY

What would happen to the value of P in the equation above if the value of X was increased by 10% and the value of Y was decreased y 10%?

Choose values for X and Y (for instance: X = 100, Y = 50; X = 100, Y = 100; X = 50, Y = 100), do the required calculations and see what happens to P.

Determine the6.) A 4-inch by 6-inch photograph is to be enlarged by proportionally so that the 4-inch side expands to 5 inches. What would be the new length, in inches, of the 6-inch side of the photograph?

Use this factor on the 2nd side.

This question is unclear to me: Is AA a valid subset?7.) A set consists of the letters A,B,C,D,E, and F. If order is not important, how many two-letter subsets are possible?

I know this is a lot of questions,<--- this is the gratest understatement of the whole thread

but I really need help to make sure that I understand how to work them. I really do appreciate your time and help. Thank you in advance.