20 SAT Math Questions You Can Annihilate Using DESMOS // Join me as I show you how to solve 20 SAT questions that you will likely find on your next digital SAT exam!
Thank you so much for the video! Loved the way you approached the problems and your vibe. I liked and subscribed :) Praying for a 1500 this August 24th :)
11:14 You can also enter the numbers on your TI84 by clicking Stat then click edit. Enter the numbers from the table in L1 (x1) and L2 (y2) then go back to stat and scroll over to calc then scroll down to ExpReg and it should do the trick as well. I only know this because I'm taking a stat class. Thank you for these handy tricks on Desmos!
Went into the March 9th SAT without knowing any of these😭😭!! Thank you so much for posting this, sincerely hoping on increasing my math score for the May 4 SAT
My exam is in 14 days and I'm just finding out bout this. Thanks so much cause now i can use my time more effectively its gonna be really helpful i hope
If ur curious abt #22 on module 1 there is an interesting way to do it by hand. U can take derivative of equation and set = to 0 to find x value of minimum, then plug x value in to find y. then plug that back in to find p and ur done. Takes like 1 min to do
or you can just solve for the vertex coordinates using the formula x = b/-2a and plugging x back in to find the y. Then plugging that y in to find P. Since it says the line only intercepts at one point, you know it has to be at the vertex because that is the only point at which a linear function can intercept a parabola once.
Man math module 2 was insanely hard, but thanks to your desmos tricks I think i did pretty well on module 2. But these percent questions and like mass questions got me in module 2
great video! this helped me so, so much, i can’t express my thanks. i have a question, though. for number 18 on the second module, you chose 7 as the number that would give you equal mean and median, but if you choose -7, it gives you the same number of 5. do they both work?
15:40 Since we are given the y-intercept of line M and we know the slopes are the same since the two lines are parallel, we can create the equation y=7x for line M. Then simply plug in the x-value coordinate we are given to solve for n. Y=7(4). Just a quicker way if you know the slopes :)
4:30 if you know that x^0 = 1 then you wouldknow that 1x27 = 27 and that didnt take long. as long as you know that inorder to find the y intercept you set x to 0
Thank you so much after watching to your videos, now I'm pretty sure that I will perform good in free live full length test on 10th and 11th August held by Mentomind.
41:38 additionally, if the question is rephrased as "find the maximum value of x so that the same condition still occurs" you can graph both the mean and median onto desmos and there will be 3 intersections at x = -7, x = 7, and x = 14, to which you'll choose 14 obviously
I found a faster way to solve the question 18 at 39:50.Firstly, we should do everything he did up to this point (plugging values, putting them on mean and median), and just like he did, we should add x to the data set. In this case, we can see that purple and black lines represent mean and median respectively, for each value of x. So we can just hide the green line by clicking on the button on the left and see points where lines purple and black intersect. This means that at those points, our mean and median values will be equal, which we can see by clicking on those intersection points. For this case there will be 2 answers for x which are 7, and 14 where our values for mean and median will be 7 and 8 for those 2 x values correspondingly. I am not saying that the method he used was wrong, but this approach will save you some time and energy i wish it was understandable😁😁😁
This is great, but it would be helpful if we could see the keystrokes of you using the DESMOS keypad provided on the screen instead of the laptop keyboard. Thanks so much!
8:05 you can literally see that when the time is 0 the money is $740. So just look for the answer choice that has 740 as a coefficient, which is just C
For question 21 the question states the lines are PARALLEL so a quick tip for you guys is parallel lines share the same slope so skipping slope formula you can just see that 7 is the slope since Y=mx+b and see that 4,28 would follow the slope of 7 since 4x7 is 28 making N = 28
7:06 Guys, it will be a lot easier (and quicker) if you put the values in the exponential growth formula ie *y=a(1+r)^t* where a is the initial value, r is the rate (in decimals), and t is the time. You'll get the answer straight up
I agree, if you know the formula, it's quicker. However, not everyone is going to remember those formulas or even have studied them before. The purpose of the video is to show how to solve and still get it correct using Desmos.
I have a question: in Q#12 in the second module, the one about the cone height. How did we determine that the radius is 1^2? It's only stated that the base is 2 in but there is nothing given about the radius. Please help me with this one.
Hi, Why aren't you using the DESMOS keyboard on the screen? I think most of us don't know all the laptop keyboard shortcuts on a laptop by heart. Thanks!
@@UberHummus No, it's not cheating. You are allowed to store formulas. There is nothing in their calculator use policy that says you can't. Using a non-approved calculator like the TI-Inspire, however, would be cheating.
@@cornerstonetestprepandtuto8898ah, I see. So then there is no need to really check the calculators at all except for models which are not allowed to be used. Got it, thanks!
If n=30 then you would not have a slope equal to 7 (remember, parallel lines must have the same slope). If you calculate the slope with the points (0,0) and (4,30) you'd get 30/4 = 7.5.
