February 15, 2018

The virus that causes bird flu can attach to the cells of the lower part of the respiratory system in humans, but not to the cells of the upper part of the respiratory system. The most likely reason for this is that these two groups of cells have different

(1) DNA codes in their nuclei
(2) enzymes in their mitochondria
(3) amounts of water in their cytoplasm
(4) receptor molecules on their membranes 

Answer and Explanatio...

February 14, 2018

Since regent is a standardized exam, doing a lot of practice is key to your success. Start by doing an exam in the red regents book and going over the explanations in the back for the questions you got wrong or were not sure about. This will also help to identity your weak areas that you can review further with the blue regents book. Do as much practice and as many exams possible. Make sure to und

February 13, 2018

Coterminal angles share the same initial side and terminal sides. To find one positive and one negative coterminal angles, all you need to do is to add 360 or subtract 360. For example, lets find the two coterminal angles of 60 degrees. Solution: 60+360 = 420 (positive coterminal angle), 60-360 = -300 (negative coterminal angle).

February 12, 2018

There are 3 different definitions of acids and bases. The first definition is by Arrhenis. Arrhenis said that when an acid dissolves in water it yields hydrogen ions (also called hydronium ions). Bases, on the other hand, when dissolved in wate

February 9, 2018

 The expression 49x^2 - 36 is equivalent to

Use this space for computations.

(1) (7x -6)^2
(2) (24.5x- 18)2

(3) (7x- 6)(7x+ 6)
(4) (24.5x -18)(24.5x+ 18) 

Answer and solution:

If we look carefully at the numbers in the problem we can identify the expression as the difference of perfect squares (a^2 -b^2). 7x if squared will give us 49x^2, and 6 squared is 36. Therefore, we can rewrite the expression as (7x)^2- 6^2. What do w...

February 7, 2018

Life is interesting, funny, beautiful and occasionally sad. Things happen. Sometimes they bring you joy and sometimes sadness. How to proceed when you encounter problems:

1. Try to come up with solutions, almost every problem has a solution.

2. Think about the most challenging obstacle you had to overcome. If you were able to overcome that, you can overcome anything!

3. You have only one life and you have a choice to...

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