How can you remember the difference between complementary and supplementary angles?
First, we have to remember that one is multiple angles that add to 90 degrees and the other is multiple angles that add to 180 degrees. Since C comes before S in the alphabet, complementary angles add up to equal 90 degrees (the smaller number) and supplementary angles add up to equal 180 degrees (the biggest number).
What are strategies for finishing the reading section of the ACT in the allotted time?
The reading section is purposely long to test your ability to read fast and still answer the questions correctly. My advice is to underline any important information in the passage as you read because the act of underlining helps retain the information. You should be reading rather quickly, but be sure to still comprehend the passage as you read. When answering the questions your should refer back to the passage if necessary, but look for the underlines that will help you out.
Why can you take a 3 out of 3x-6 but not 3x-5 when simplifying the expression?
The first expression has a factor of 3 in both the first and second terms, while the second expression does not. When simplifying the first expression to 3(x-2) you must be able to multiply the 3 on the outside by both x and 2 with the original expression as your answer.