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E Math Academy
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เข้าร่วมเมื่อ 19 มี.ค. 2016
Answers to each SAT math practice test problem from Practice Test #1 are worked out and explained.
Example Problems: How to Simplify Expressions with Exponents
www.emathacademy.com/
This video explains how to simplify expressions with exponents. Multiple problems are solved from two different worksheets. The primary rules of exponents used are:
(x^a)(x^b) = x^(a+b)
(x^a)/(x^b) = x^(a-b)
(x^a)^b = x^(ab)
(xy)^a = (x^a)(y^a)
(x/y)^a = (x^a)/(y^a)
x^-a = 1/(x^a)
x^0 = 1
x^(a/b) = b√(x^a) = (b√x)^a
If you are looking for explanations for why the rules of exponents make sense, watch this video first: th-cam.com/video/tSUW02rvMYQ/w-d-xo.html
Notes for the rules of exponents can be found here: www.emathacademy.com/math-notes-and-videos.html
Below are links to the two worksheets for the problems from this video.
cdn.kutasoftware.com/Worksheets/Alg1/Properties%20of%20Exponents.pdf
cdn.kutasoftware.com/Worksheets/Alg1/More%20Properties%20of%20Exponents.pdf
E Math Academy provides personal online math tutoring. To inquire about our services, please view this link: www.emathacademy.com/trial-lesson.html
This video explains how to simplify expressions with exponents. Multiple problems are solved from two different worksheets. The primary rules of exponents used are:
(x^a)(x^b) = x^(a+b)
(x^a)/(x^b) = x^(a-b)
(x^a)^b = x^(ab)
(xy)^a = (x^a)(y^a)
(x/y)^a = (x^a)/(y^a)
x^-a = 1/(x^a)
x^0 = 1
x^(a/b) = b√(x^a) = (b√x)^a
If you are looking for explanations for why the rules of exponents make sense, watch this video first: th-cam.com/video/tSUW02rvMYQ/w-d-xo.html
Notes for the rules of exponents can be found here: www.emathacademy.com/math-notes-and-videos.html
Below are links to the two worksheets for the problems from this video.
cdn.kutasoftware.com/Worksheets/Alg1/Properties%20of%20Exponents.pdf
cdn.kutasoftware.com/Worksheets/Alg1/More%20Properties%20of%20Exponents.pdf
E Math Academy provides personal online math tutoring. To inquire about our services, please view this link: www.emathacademy.com/trial-lesson.html
มุมมอง: 62
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How to Understand the Rules of Exponents
มุมมอง 114หลายเดือนก่อน
Find the notes as a PDF here: www.emathacademy.com/math-notes-and-videos.html This video shows the rules of exponents and explains why they make sense through various examples. There are 8 common rules of exponents explained. The rules are: (x^a)(x^b) = x^(a b) (x^a)/(x^b) = x^(a-b) (x^a)^b = x^(ab) (xy)^a = (x^a)(y^a) (x/y)^a = (x^a)/(y^a) x^-a = 1/(x^a) x^0 = 1 x^(a/b) = b√(x^a) = (b√x)^a The...
How to Solve Mixture Problems
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www.emathacademy.com/ This video shows how to set up and solve any type of mixture problem for students in Algebra 1 or Algebra 2. To solve mixture problems you can create a table where you multiply the percent by the whole amount to get the part. Then you can add the whole amounts together to get the whole amount of the mixtures. The two parts can also be added together to find the part of the...
Exponential Functions for SAT Math - What You Need to Know
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www.emathacademy.com/ Learn the basics of what is helpful to know for exponential functions for the SAT math section. This video covers what exponential functions look like and how to match an exponential function to a graph. It also shows how to calculate an annual interest rate from an exponential function. Here are more resources for the SAT math section below. SAT Math Notes www.emathacadem...
Completing the Square for Circles for SAT Math - What You Need to Know
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www.emathacademy.com/ Learn how to use the method of completing the square to solve problems related to circle for the SAT math section. This video shows how to take an equation and convert it to the standard form of an equation for a circle and then how to identify the center and radius of the circle. Here are other SAT math resources below. SAT Math Notes www.emathacademy.com/sat-math-notes.h...
Rational Expressions and Equations for SAT Math - What You Need to Know
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www.emathacademy.com/ Learn how to simplify or solve rational equations and expressions for the SAT math section. This video covers how to factor expressions and the cancel common factors in the numerator and denominator. It also covers algebraic tricks to solve for a variable in rational equations. Here are more SAT math resources below. SAT Math Notes www.emathacademy.com/sat-math-notes.html ...
Sine and Cosine of Complementary Angles for the SAT - What You Need to Know
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www.emathacademy.com/ Learn tips on how to solve problems involving the sine and cosine of complementary angles for the SAT math section. Remember that you can use SOH CAH TOA if you forget the trigonometric ratios. SOH stands for Sine = Opposite / Hypotenuse CAH stands for Cosine = Adjacent / Hypotenuse TOA stands for Tangent = Opposite / Adjacent Here are additional SAT math resources: SAT Ma...
Best Fit Lines for SAT Math What You Need to Know
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www.emathacademy.com/ Learn about best fit lines and correlations for the SAT math section. This video explains what a line of best fit is and tells how to distinguish between strong, weak, positive, and negative associations. Here are a few other useful resources for studying for the SAT math section: SAT Math Notes: www.emathacademy.com/sat-math-notes.html SAT Math Formulas: www.emathacademy....
Polynomial Division for SAT Math What You Need to Know
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www.emathacademy.com/ Learn how to use polynomial long division to find equivalent expressions and and remainders for the SAT math section. Here are other useful SAT math resources: SAT Math Notes: www.emathacademy.com/sat-math-notes.html SAT Math Formulas: www.emathacademy.com/sat-math-formulas.html SAT Practice Tests, Answer Explanations, and Scoring Information: www.emathacademy.com/sat-prac...
Function Notation for SAT Math - What You Need to Know
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Data Inference for SAT Math - What You Need to Know
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www.emathacademy.com/ A short lesson on the topic of data inference for the SAT math section. This video covers what you need to know about making data inferences for a population from a sample. It is important that you have a random sample so you don't have bias. It also covers the concept of confidence levels in relation to SAT math questions. Here is a link to a full set of SAT math notes: w...
SAT Math Practice Test 1 - No Calculator Section Answers
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www.emathacademy.com This video shows how you can graph linear equations to make interesting artwork. It teaches how to graph lines using the slope intercept form, y=mx b. Concepts related to the slope and y-intercept of a graph are covered. Additionally, the concept of a domain is discussed and shown how it can be applied to show only a portion of a line. This is a fun linear equations activit...
E Math Academy Online Math Tutoring Service
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www.emathacademy.com Sign up for a free online math tutoring trial lesson through our website. E Math Academy provides online math tutoring for students at international schools. We cover classes for Pre-algebra, Algebra, Geometry, Algebra 2, Trigonometry, Pre-calculus, AP Statistics, and AP Calculus. Additionally, we help students prepare for the math section for either the SAT or ACT. For a c...
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How to Solve Distance Rate Time Problems
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SAT Math Practice Test 1 No Calculator #8
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SAT Math Practice Test 1 No Calculator #8
SAT Math Practice Test 1 No Calculator #7
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SAT Math Practice Test 1 No Calculator #7
SAT Math Practice Test 1 No Calculator #6
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SAT Math Practice Test 1 No Calculator #6
SAT Math Practice Test 1 No Calculator #5
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SAT Math Practice Test 1 No Calculator #5
Hi, thank you for the videos. I wanted to know what was the solution for the final question.
I just found the answers to the assessment worksheet my algebra teacher gave me! Sleeping in class has no side effects…
Thanks for the clear explanation on how to solve mixture problems!
Very helpful for understanding exponent rules!
KING JON SACK!
Lifesaver
W thx for the help i was struggling in math now you helped me
Thanks
An easier way to do 5:11 (problem 6) is to equate it with algebraic equations: Let x be Kali's time: K = x and let Matt = x - 1 (put minus one since he left an hour later) Kali's speed it at 40kpm and Matt's speed is at 50kpm and let's multiply their speeds with their respective assigned algebraic equations: 40(x) = 50(x - 1) 40x = 50x - 50 50 = 50x - 40x 50 = 10x 5 = x Let's recall that Kali's speed is equated to x, which means x = 5 so that's Kali's time. Matt's time is x - 1 so 5 - 1 = 4, you still get the same answer.
I’m really trash at math but why can’t you just set both k and m =200 on the table. 40x5=200 and 50x4=200. Is that coincidence? Because that doesn’t exactly give you the answer. Because Matt can drive over 200 since he drove faster. So I don’t get why that works I also don’t get why his answer works. Because Matt’s should be a decimal right? Ohh, he left an hour later. I forgot
Finally there is a method to the madness. I have gone through many different ways to solve these problems and i felt i was right where i started. This is curtailed to fit my understanding. Thank you so much!
Glad to hear it was helpful.
holy shii that chart is the best thing ever
Bro this is the exact worksheet I have. I am studying for the ASTB for the Navy and I took this sheet into a tutor at my college and I did not get it at all with his explanations. Really got me discouraged. Thank you for posting!
ds might seem like long shot but j' wondering how u did? did u pass? and what score did u get?
Glad to hear this could help you understand the problems better.
bro im a senior in highschool taking this pisslow easy college algebra course for the college credits and everything is so easy except for this how the fuck do yall do this
idk bro good luck
underrated
can you do function problems with graphs
there is something wrong with the last graph, it should be y=-1/2(1/4)^x
Thankyou very much...this was helpful..I can be able to do my homework now😊😊
I have a question, so on question 14, you write 8 as 2 cubed, could you explain why that is? its probably very obvious but I just don't understand how it works and I'd like to know so I don't have trouble with a similar question on my SATS
Thank you random man on the internet you literally just saved my entire midterm
Awesome! Glad to hear that.
Why did u subtract 40 to 400????? Thank you
Is there an equivalent to this equation for the rate you spend your food budget?
is #6 correct?
thanks mate
Umm I'm so lost on question 5 someone send help
THANK YOU SO MUCH FOR THIS!
This was so helpful! Thank you!!
what if they leave at the same time ??
Thank you so much.
I need help on questions 9 and 10.
This is awesome 👏 thank you so much
why are these so easy if this cause I'm Asian or what?
This is the best explanation I've seen. Thank you for being so clear
Thank you for the kind words. I'm glad it helped make sense of the problems for you.
Super helpful!! 👌🏽
thank you
no maidens?
why did you use -2 in solving the system of equations
It’s hard but I am trying to improve it
Thank you. I didn't pay attention in class and this helped lol
Bro you are a literal life saver I was sick the day my teacher show us this and I have to keep this A. THANK YOU SO MUCH
I totally feel ya, I would hate to lose an A what grade did they teach the word problems?
Awesome!
شُكرا ! Thanks!
These genuinely make zero sense to me no matter how many videos I watch and it’s driving me crazy
As far as I understand there is a mistake in question 4: it asks the time Jose drove before Rob caught up not the overall time of Jose's journey. So I believe the answer is 1
It took Rob 5 hours to catch up with Jose, who had been driving for a longer amount of time (because he left earlier than Rob). So that tells you right there that Jose had to have been driving for a longer amount of time than 5 hours. So the answer couldn't be 1. "1 hour" would be the correct answer if the question were "For how long did Jose drive, AFTER Rob departed, before Rob caught up with him?" But the question is simply "How long did Jose drive before Rob caught up?" (I.e. What was Jose's total driving time up to the point that Rob caught up?)
THX FOR THE WONDERFUL VID
Thank you so much 😭 my math teacher explained this so many times and I couldn’t understand
LIFESAVER
these questions are so similar to mine!
ANYBODY DOING THIS IN 8TH GRADE?
ty mate
Him using m to represent miles instead of mi is confusing me with metres lol
Yeah lol 😆
Hiii. For number 1, why can’t we just divide 3v blah blah blah by 3?