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nordsb [41]
3 years ago
9

Find the nonpermissible replacement for a in this expression 8/-9a

Mathematics
2 answers:
Soloha48 [4]3 years ago
7 0
The variable a  cannot be zero because that would make -9a = zero  and   8 divided by zero is indeterminate.
yuradex [85]3 years ago
4 0

the answer is 0 everyone. got it right on my sisters test

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What is the equivalent property of 7(x+3)
Margarita [4]

Answer:

7x+21

Step-by-step explanation:

4 0
3 years ago
Solve the system of equations two ways: 3x+y=5 and x-2y=4 A) using substitution B) using elimination
Vedmedyk [2.9K]
A. solve for 1 variable
let's solve for x in 2nd equation
add 2y to both sides
x=2y+4
sub 2y+4 for x in other equation
3(2y+4)+y=5
6y+12+y=5
7y+12=5
minu12 both sides
7y=-7
divide 7
y=-1
sub back
x=2y+4
x=2(-1)+4
x=-2+4
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(2,-1)


B. eliminate
eliminate y's
multiply first equation by 2 and add to first

6x+2y=10
<u>x-2y=4 +</u>
7x+0y=14

7x=14
divide by 7
x=2
sub back
x-2y=4
2-2y=4
minus 2
-2y=2
divide -2
y=-1
(2,-1)



(2,-1) is answer
5 0
3 years ago
What is the factored form of this expression?<br> 9x^2-65y^2
Lesechka [4]

Answer:

Step-by-step explanation:

I suspect it is 64 not 65,

9x^2-64y^2

= (3x - 8y)(3x + 8y).

(If it is 65 there are no factors)

6 0
2 years ago
Read 2 more answers
Hey I need help a lot of help
Neko [114]
30
6 times 5 is 30 and since its 6 per hour you just do it to five :)
4 0
3 years ago
Read 2 more answers
Factorise the following quadratic expressions;<br> 6a-18a<br>21x -3x²<br>1/16 - p²<br>25v²-1<br>​
Lubov Fominskaja [6]

Answer:

− 12 a

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Step-by-step explanation:

I think these are the right answers

3 0
2 years ago
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