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math
can someone please help me with some math problems because my teacher didnt finish the lesson but still gave us homework and no one in my math class is online
(-6) to the negative 1 exponet
4(10) to the negative 2 exponet
7 to the zero exponet + 6 to the negative 2 exponet
10 to the negative 2 exponet times 10 to the 5th exponet
(10x + 2y) divided by 5
(tr - r) divided by r
if you can help me with ANY of these i will be so grateful
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Want to answer more questions in the Work & School category?
Maybe give some free advice about: School?
All Right I will show how to do exponents (though I will not give you the answers to your problems. an exponent is saying how many sets there are of an certain # so if you have a problem that states 10 with an exponent of 3 it would look like 10 x 10 x 10 = 100 x 10 = 1000.
these are basic problems.
1) 5 to the 2nd power (or exponents) also can look like 5^2.
• 5 ^2 = 5 x 5
• 5 x 5 = 25
• So 5^2 is equal to 25
2) -9 to the 5 power also is -9^5
• -9^5 is the same as ( = ) -9 x -9 x -9 x -9 x -9
• -9 x -9 x 9 x -9 x -9 is equal to ( = ) 89 x 89 x -9
Because 9 x 9 = equal 89 and when u have two negatives they become a positive so -9 x -9 = 89
• 89 x 89 x -9 = 7921 x -9
• 7921 x -9 come to ( = ) -71289
Here are some tips on exponents, is your base number (the big one) is negative and the exponent is an even number then your final answer will be a positive. If your base number is negative and the exponent is an odd, then your final answers will be a negative
Sorry I can’t remember how to do negative exponents. Try looking in your math text book they may be able to offer some help.
For division
It works best if you lay it out right.
For an example; Divide [4a] and [8b] with 2b
You should first lay it out right. It should look like this.
now your 1st step is to remove all alike variables from the problem
4a + 8b
_______
2b
So it should look like this 4a + 8
_______
2
because 8 and 2 both had the same variable (b)
Now you can ignore the last variable for right now, and just divide.
It should now look like this (2a + 4) which is just 2a + 4 ______
And that is your final answer. 1
Here is a similar one with no numbers but just variables; don’t worry it is easier than it looks.
(ab – dc)
_____________
bce now cancel out all able variables, (u can tell if it able of not if they in both the top and bottom)
so it will look like (a – d)
______
e
I hope this helps you out (let me know if it did) if you have any more questions just drop a line. I’ll try to answer the best I can.
Best of luck
~Teen Guru~
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If a number is to a negative exponent, put it under 1. Then, make the exponent positive and apply it to the bottom number. For instance:
4(10)^-2
The rules say that you do exponents first, so.
4* 1/10^2
This can go to 4* 1/100, which is 1/25.
Anything to the 0th exponent is always 1.
That should help you on the first 4.
10x+2y divided by 5 is trickier. You need to divide it all by 5. That will be 10x/5 + 2y/5. AKA, 2x+2/5Y.
(tr-r)/r is one of my favorite things. Factoring. Both tr and r have an r in it, so factor out an r. r(t-1). Divided by r, it makes t-1.
I'm in precalculus, so if you need any help on any problem, just drop one in the inbox.
:)
-Steven
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