Main content
Course: CAHSEE > Unit 1
Lesson 1: CAHSEE- CAHSEE practice: Problems 1-3
- CAHSEE practice: Problems 4-9
- CAHSEE practice: Problems 10-12
- CAHSEE practice: Problems 13-14
- CAHSEE practice: Problems 15-16
- CAHSEE practice: Problems 17-19
- CAHSEE practice: Problems 20-22
- CAHSEE practice: Problems 23-27
- CAHSEE practice: Problems 28-31
- CAHSEE practice: Problems 32-34
- CAHSEE practice: Problems 35-37
- CAHSEE practice: Problems 38-42
- CAHSEE practice: Problems 43-46
- CAHSEE practice: Problems 47-51
- CAHSEE practice: Problems 52-53
© 2024 Khan AcademyTerms of usePrivacy PolicyCookie Notice
CAHSEE practice: Problems 52-53
CAHSEE Practice: Problems 52-53. Created by Sal Khan.
Want to join the conversation?
- Isn't reciprocal also called multiplicative inverse?(9 votes)
- any tips for me. i am about to take the cahsee on wed. i am not that smart
and not good at math at all, any subject. so are there any tips you can give to pass or at learn these things faster?(4 votes)- Try not to take the test while under the influence of any kind of drug or alcohol. It will only cloud your judgement and hurt your chances of getting out of High School even more.
Hope this helps!
-Carlos(2 votes)
- Can teacher make his students take the CAHSEE test in middle school?(1 vote)
- Well...CAHSEE is a requirement for HIGH schoolers to graduate, so no. Middle schoolers cannot take CAHSEE.
Hope this helps! =D(4 votes)
- what does it do you learn a little of it its needs to be a better video please(1 vote)
- Please give feedback on the videos so Khan Acadedmy can make better videos.(2 votes)
- at0:16he just started to solve the problem is there another way to do this.(1 vote)
- What I wou do is answer the problem first then see what answer goes with that question(2 votes)
- Approximately how many questions does the CAHSEE have?(1 vote)
- Don't worry about the CAHSEE anymore. It will be wbolished starting January 1, 2016.(1 vote)
- Can someone give me tips about CAHSEE cause I’m new not that smart(1 vote)
- how can i do notes to remember all this steps(1 vote)
- Well all the videos help me pass the 2014 ged math test?(1 vote)
- does this only stop at 53(1 vote)
Video transcript
Problem 52. Colleen solved the equation 2
times 2x plus 5 is equal to 8 using the following steps. OK, so she has a
bunch of steps. To get from Step 2 to Step 3,
Colleen-- so it's good that I read the question before I just
started diving into it. So to get from Step 2 to Step
3-- so this is her Step 2, and this is her Step 3 right here. What did she do to get
from here to here? Well, she divided
both sides by 4. Right? You could say 4x is
equal to minus 2. If you divide both sides of
this equation by 4, the left-hand side-- these cancel
out, you're just left with x. And then the right-hand side,
minus 2/4 is just minus 1/2. So she just divided
both sides by 4. And that is choice A. She definitely didn't subtract
4 from both sides. She didn't add 4
to both sides. And she didn't multiply
both sides by 4. Then we would have
had 16x minus 8. So that was a pretty
straightforward problem. And then 53. What is the reciprocal
of ax squared over y? This is another, you just have
to know what a reciprocal is. A reciprocal of something is
just 1 over that something. Or if it's a fraction,
you just flip it. So if you have a/b, the
reciprocal is b/a. If you have xy/ab,
the reciprocal is going to be ab/xy. So if you have ax squared over
y, its reciprocal is just going to be y over ax squared. That easy. And that is choice D,
y over ax squared. You just have to know to flip
this fraction right there.