SCORE: 13/16
INCORRECT ANSWERS:
1. The graph g(x) is shown above. If g(k)=1 which of the following is a possible value of k?
* -1.5
*-.5
*1
*1.5
*2
I thought it would be 1 because g(k)=1... Another function problem.
You know what i am gonna say
I'll go over it on the weekend. But explain this to me for now..
2. A regulation for riding a certain amusement park ride requires that a child be between 30 inches and 50 inches tall. Which of the following inequalities can be used to determine whether or nor a child's height h satisfies the regulation for this ride?
A.|h-10|<50
B.|h-20|<40
C.|h-30|<20
D.|h-40|<10
E.|h-45|<5
So i brought it down to two choices, D & E.
I used two numbers to plug in: 25 & 55. If a number made the sentence correct, than that letter was not an answer. And then i was dumbstruck when i came down to the last two. What should be my approach be?
3. The pattern shown above is composed of rectangles. This pattern is used repeatedly to completely cover a rectangular region 12L units long and 10L units wide. How many rectangles of dimension L by W are needed?
*30
*36
*100
*150
*180
.. um i really need help..
& I don't think i will do another session today. It's been a very short day as i woke up at 2:30 and i'm sort of tired. All this work is really wearing me out.
I will be back on schedule tomorrow.
Thanks for everything and enjoy your birthday
1 comment:
Opal,
You don't get functions. You need to learn them. You need to get a math textbook and learn exactly how they work and what they mean and what their properties are. This is what you need to do before you do ANYthing else. They are unbelievably simple. Really incredibly simple. You are just not familiar with the notation. You will stop stressing out about getting questions wrong and improve your score drastically when you learn how to use them.
2. The answer to this question is D. Opal, its important not to plug in answers to the question immediately. In such cases, its more important to evaluate what the function is actually saying. An absolute value function tests how "far" away a number is from another.
The requirement for the ride is that someone be between 30 and 50 inches. Another way to say that is that someone be within 10 inches of 40inches tall. So |X-10|<40 -- answer D. This is the correct way to think about it
Your issue when you plugged in here is that you tested numbers that were not correct to see if they came out correct, but you DIDNt plug in numbers that WERE correct to see if they came out incorrect.
Testing the # 35 would show you that E is incorrect.
Again, the bigger issue is that you didn't grasp what the function with absolute value was actually saying. Always try to understand what they mean rather than plugging in numbers blindly. Seriously
3. There's an equation here: the left side and the right side are the same length
2L=3W. W= (2/3)*LThats the main point.
Then theres a thing with area 12L x 10L, or its 120 square Ls.
They want to know how many L by W rectangles fit into it
The area of an LxW rectangle is L x W, or L x (2/3)L, or 2/3 square Ls.
120/(2/3) is 180, which is the answer. Tough one, but you gotta figure out what the thing is saying.
Plugging in is actually not a terrible idea here. Each LxW rectangle is 4*6, or 24. The big triangle is 60*72
60*72/24 = 180-- same answer. You had it! don't get discouraged
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