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mario62 [17]
3 years ago
12

Please do the questions that aren't answered! Show work!!

Mathematics
1 answer:
Brrunno [24]3 years ago
3 0
4) 0=-5n-2n
0=-7n
n=0
5) 6r-1+6r=11
12r-1+11
12r=12
r=1
6) r+11+8r=29
9r=18
r=2
7) -10=-14v+14v
-10=0
no solution because the sides are not equal
10) a-2+3=-2
a+1=-2
a=-3
11) 18=3(3x-6)
18=9x-18
36=9x
9x=36
x=4

hope i could help
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5 0
3 years ago
Read 2 more answers
Factor completely. 2x^2y + 2xy + 4x + 4 A. (2x + 4)(xy + 1) B. (2x + 4y)(x + 1) C. 2(xy + 2)(x + 1) D. (2xy + 4)(x + 1)
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2(xy + 2)(x + 1)   (C)

Step-by-step explanation:

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= (2xy + 4)(x + 1)

=  2(xy + 2)(x + 1)

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3 years ago
Writing a Linear Equation Given Two Points
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Answer:

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Hope this helps :)

5 0
2 years ago
Agatha is five times older than her son bob. three years ago she was nine times older. how old is agatha?
Naya [18.7K]
Write an equation system based on the problem
"Agatha is five times older than her son, Bob" could be written as:
  a = 5b.......(first equation)
"Three years ago, she was nine times older" could be written as:
  a - 3 = 9(b - 3)......(second equation)

Solve the equation system
To find the value of b, substitute 5b as a to the second equation
a - 3 = 9(b - 3)
5b - 3 = 9(b - 3)
5b - 3 = 9b - 27
5b - 9b = -27 + 3
-4b = -24
   b = -24/-4
   b = 6
Her son, Bob, is 6 years old

To find Agatha's age, substitute the value of b to the first equation
a = 5b
a = 5 × 6
a = 30
Agatha is 30 years old
4 0
3 years ago
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