Feb+3+homework+help+and+study+tips

I was asked how to do some problems on yesterday's homework. here is my response. you might find it helpful to you too.

the EXPERIMENTAL probability of rolling a 4, you should always look at the data from an EXPERIMENT. that means you have to look at the data that is given to you. lesson 9-7 #1.find the experimental probability of rolling a 4. is the face 4 comes up 8 times when you rolled the dice 40 times. that is 8/40=1/5 the THEORETICAL probability is the probability in THEORY, for example, you rolled a dice, and the probability of getting a 4 is 1/6, because there is only one 4 on a dice, but there are 6 numbers on the dice, they are 1, 2, 3, 4, 5, and 6. so the THEORETICAL probability of getting a 4 is never changed, always 1/6. but the question is asking for the theoretical probability that is NOT rolling a 4. so you have to find the complementary event of rolling a 4. and you know that P(4) + P(not 4)=1. that is 1/6 + x = 1. solve this equation, you should get 5/6. so the same thing for #3, and #4. x/500 = 12/40, and 12/40 is the experimental probability. solve for x.
 * 1) 5. you will use the experimental probability to evaluate how many times would it land on 5. since this is a proportional problem, you can set up a proportional equation. let the number of time land on 5 be x. that is

lesson 10-2. that is vertical angles. the angles opposite from each other, they are opposite angles. If you forgot about this lesson, you should go back to review your notes or the textbook on lesson 10-2. chapter 10, section 2. and review it. vertical angles are equal in measures. since one of the angle is 40 degree, its vertical angle is also 40 degree. I hope these will help you.

let me give you some tips on study, always read the examples how people solve the problem, try to understand the reasons and logic between the connections of each step. and ask yourself these questions: 1. why do they do this? 2. why do they use this method? 3. which method is more easy for me to understand? 4. next time, when I see this kind of questions again, how should I solve it? 5. where do I start to solve this problem? 6. what information is given? and what do I have to find? 7. what is the relationship between what is given and what I have to find? and next time, if I am not available to answer your questions right away, you can find the key words from the question, use the index page to help you find that lesson. read the examples, and apply above questions when you read the examples. I hope these information will help you on your study across all subjects.