https://drive.google.com/file/d/0Byj63N7gt51GTmZ6U04tNC03Qkk/view?usp=sharing
Can someone please help me with these doubts.
The sum of n and 5 is equal to 2. What number is equal to n minus 4?
A) -7
B)-3
C)-1
D)3
E)7
@UAS998 just solve for n…
…or even quicker:
n + 5 = 2
Subtract 9 from each side
n - 4 = 2 - 9 = -7, choice (A)
(solving for n first here is certainly okay - it just adds one extra step)
Thanks a lot.
Can someone help me
http://gyazo.com/76ae6de3deaaef09385a611faea56d55
A is the answer
In particular, the y-intercept will be translated down 3 units. Can you get the answer now?
oh yeah im stupid lol, i couldn’t think of the y-intercept for some reason -_-
That being said, how about this problem?
http://gyazo.com/83d4e2f35de30f27e3018e32eb257f82
Well k is the average of a and b. Can you write an equation describing that and then solve for b?
(a+b)/2=k Then solve for b to get: b=2k-a which is (E).
Hey if anyone needs help you can ask me, I got an 800 on this, just came back to give tips and stuff :).
Just solved that one, just one more problem
http://gyazo.com/51bfeb093c74f6046ec33eaf01d04413
Answer is C, thanks for the help so far guys
@zztop12 Note that the length of AB is simply the x-coordinate of B, as A and B have the same y-coordinate (by symmetry).
Let (x0, y0) be the coordinates of B (so that x_0 is the desired length). Since B lies on both graphs, we have
y0 = x0^2
y0 = k - x0^2
Then x0^2 = k - x0^2 --> 2x0^2 = k. We are given that x0 is an integer, so k is 2 times a perfect square. All choices work except C, because 12 = 2*6 and 6 is not a square.
Ahh I see. I’m just gonna keep asking question for the June SAT lol, gonna need all the help I can get
http://gyazo.com/1e3f5f5bead6e8e264830ccf45cde91c
Another annoying question, I’m still not solid on how to deal with decimals
@zztop12 that question has no decimal numbers (unless you count square roots) and a ton of useless shapes that aren’t used in the solution. You only need to look at triangle DEF.
^Furthermore, you should memorize side relationships in a 30-60-90 and 45-45-90 triangle for the SAT.
What is the best way to solve questions including a function and a graph? Please help
^That really depends on the question given; I don’t think I can sum up every strategy about functions and graphs questions in a few sentences (and I’ve tutored algebra/calculus).
Suppose they give you a question y=ax+b and then they till u to find graph of y=2ax+b how to figure that out?
And also y=a/3x+b and they ask what ll happen to the graph?
y = 2ax + b has the same y-intercept but with slope twice as much (the graph should look “steeper”).