## anonymous one year ago I need some help with Algebra please! What is the simplified form of each expression? 1. –(10)–1 (1 point) -1/10 -1/1 10 1/10 10 2. 1/c -5 (1 point) c5 5c –c5 – 5/ c 3. What is the value of y-5/x -3 for x = 2 and y = –4? (1 point) 10/3 128 –1/128 –128

1. anonymous

I'll medal whoever can help me out i need to turn this in asap and i am absolutely terrible at math but cant let my grade get any lower, anyone that goes to indiana connections help me out please!

2. anonymous

I know number one is 10. I don't understand the others though.

3. zepdrix

$\large\rm -(10)^{-1}$Is this the first one? :o

4. zepdrix

Recall that for negative exponents we have this going on$\large\rm x^{-a}=\frac{1}{x^a}$And,$\large\rm \frac{1}{x^{-b}}=x^b$

5. anonymous

if it is then 10 won't be the answer it would be -1/10

6. anonymous

how are you doing that? i couldn't put the questions in correctly thats why there kind of hard to figure out what im asking

7. anonymous

but yes that is the first one

8. zepdrix

The equation tool. It takes a little getting used to though :)

9. anonymous

$\frac{ 1 }{ c } ^{-5}$ well then this would be question #2 but the exponet on the bottom not the top lol i attempted to use the equation tool

10. zepdrix

So use the second rule I posted :)

11. zepdrix

Apply the exponent rule to your 10, flip it in order to change the exponent to positive.$\large\rm -(10)^{-1}=-\frac{1}{(10)^{+1}}=-\frac{1}{10}$You were fine with the first one?

12. anonymous

Oh okay thank you, would number 2 be -c5?

13. zepdrix

To get rid of the negative on the exponent, flip the c up to the numerator,$\large\rm \frac{1}{c^{-5}}=\frac{c^{+5}}{1}=c^5$Be careful with this though, I'm NOT exchanging the c and 1. I'm only moving the c. Example, if this had been your problem:$\large\rm \frac{2}{c^{-5}}$It would become$\large\rm \frac{2c^{+5}}{1}=2c^5$You're just flipping the c up to the numerator, and the exponent changes to positive. All that's left in the bottom is a 1 pretty much.

14. anonymous

So it would be $c^{5}$ not $-c^{5}$

15. zepdrix

correct :)

16. anonymous

Thank you so much! Do you think you can help me with number 3 as well?

17. zepdrix

|dw:1442382222840:dw|Apply your exponent rule to each of these BEFORE you plug the values in.

18. zepdrix

The x will come up top, the 3 will become positive, the y will go down below, the 5 will become positive, ya?

19. zepdrix

|dw:1442382287125:dw|

20. zepdrix

I would recommend that you put brackets around your numbers when you plug them in, just to remind yourself that the exponent is being applied to the negative sign as well.

21. anonymous

Would it end up being 128?

22. zepdrix

|dw:1442382496242:dw|Hmm the bottom number is going to be a lot larger than the top, not sure how you ended up with a big number like that. Should be something really small.

23. anonymous

Im not good at this at all. . sorry :/ $\frac{ 10 }{ 3 }$ then?