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Novosadov [1.4K]
3 years ago
12

7x+3y=8 6x-3y=5 what is the value of x-y? PLEASE HELP & FAST!

Mathematics
1 answer:
Brut [27]3 years ago
3 0
X=7
y= -9

hope this helps 
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Find the difference of(ab+8a+1)-(-6ab+4)
vagabundo [1.1K]
Hey there!

When finding the difference of expressions like these, there's a few things you should keep in mind. 

1. When finding the difference of two polynomials, multiply the polynomial that implied to be "negative" by –1 to expand the problem and make it easier to solve. 

2. You combine terms based on their unknown terms, like x, y, x², ab, etc. You cannot combine the terms x and x², but you can combine the terms 6b and 8b by adding them. 

3. You can rearrange your terms however you see fit. If a polynomial is implied as "positive", you can multiply that entire polynomial by +1 to get rid of the parentheses. 

With all that in mind, you can go ahead and solve for your difference, like so:

(ab+8a+1)-(-6ab+4)

(ab+8a+1) (-1(-6ab+4))

(ab+8a+1) + (6ab-4)

ab+6ab+8a+1-4

7ab+8a-3

7ab+8a-3 will be your difference. 

Hope this helped you out! :-)
8 0
3 years ago
A ^-4 / a ^-6 please simplify and show your work if possible <:D
kipiarov [429]

\bf ~\hspace{7em}\textit{negative exponents} \\\\ a^{-n} \implies \cfrac{1}{a^n} ~\hspace{4.5em} a^n\implies \cfrac{1}{a^{-n}} ~\hspace{4.5em} \cfrac{a^n}{a^m}\implies a^na^{-m}\implies a^{n-m} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \cfrac{a^{-4}}{a^{-6}}\implies a^{-4}\cdot a^6\implies a^{-4+6}\implies a^2

7 0
3 years ago
10, 30, 90 continue the pattern
Novosadov [1.4K]
The answer is 270, the pattern is multiplying by 3. So, 10 • 3 = 30 30 • 3 = 90 90 • 3 = 270, and so on. Hope this helps! Let me know if you need any further assistant.
7 0
3 years ago
Read 2 more answers
What is the answer to number 1 question?
never [62]
I do not know the answer
8 0
4 years ago
What is the greatest common factor of the polynomial -25y^3+15y^2-5y
Sonbull [250]

Answer:

-5y

Step-by-step explanation:

4 0
3 years ago
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