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pochemuha
3 years ago
14

System of equations 12x-5y=-20 y=x+4

Mathematics
1 answer:
Fiesta28 [93]3 years ago
5 0
12x-5(x+4)=-20
12x-5x-20=-20
12x-5x=-20+20
7x=0
X=0
Y=0+4=4
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1. Bailey withdrew $135 from her checking account. Write an algebraic expression that describes Bailey's action.
MArishka [77]

<u><em>Answer:</em></u>

c − 135

<u><em>Explanation: </em></u>

Let's say that the amount of money in Bailey's checking account is  

c  dollars.

We also know that she took away  $ 135

From this variable and number, we can state the algebraic expression

 c − 135

<h2><u><em>Hope this helps!</em></u></h2>

<u><em></em></u>

7 0
3 years ago
Josh is hiking glacier national park. He has now hiked a total of 17km and is 2km short of being 1/2 of the way done with his hi
Alla [95]

Answer: The total length in kilometers is 38 km


Step-by-step explanation:


17 + 2 = 19 km is 1/2 of the total length, that is,


19 = (1/2)h


(1/2)h = 19 multiply both sides by 2


h = 2*19


h = 38 km

5 0
3 years ago
-. Lori needs $4,000 to take her family on
prisoha [69]

Answer:

Lori would have to save $5,760

Step-by-step explanation:

Since 320×6=1920, you would have to add to see witch number would be best to save up too. You would get $5,760 when you multiple by 3.If you multiple by 2,it wouldn't give you enough money.

7 0
3 years ago
Read 2 more answers
Given the system of equations:
uranmaximum [27]

Answer:

x=4

y=2

Step-by-step explanation:

2x+2y=12

x−y=2

​In order to solve by elimination, coefficients of one of the variables must be the same in both equations so that the variable will cancel out when one equation is subtracted from the other.

2x+2y=12,x−y=2

To make 2x and x equal, multiply all terms on each side of the first equation by 1 and all terms on each side of the second by 2.

2x+2y=12,2x+2(−1)y=2×2

Simplify.

2x+2y=12,2x−2y=4

Subtract 2x−2y=4 from 2x+2y=12 by subtracting like terms on each side of the equal sign.

2x−2x+2y+2y=12−4

Add 2x to −2x. Terms 2x and −2x cancel out, leaving an equation with only one variable that can be solved.

2y+2y=12−4

Add 2y to 2y.

4y=12−4

Add 12 to −4.

4y=8

Divide both sides by 4.

y=2

Substitute 2 for y in x−y=2. Because the resulting equation contains only one variable, you can solve for x directly.

x−2=2

Add 2 to both sides of the equation.

x=4

The system is now solved.

x=4,y=2

Correct choice is B) x=4.

8 0
3 years ago
Read 2 more answers
I NEED HELP PLEASE !!!Sketch a rectangular prism that has a volume of 36 cubic cm. Label the dimensions of each side on the pris
navik [9.2K]

Answer:

  • Height: 3cm
  • Length: 6cm
  • Width: 2cm

Step-by-step explanation:

To sketch such a Rectangular Prism, all you need to do is to ensure that the product of the dimensions gives 36 cubic cm.

An example is attached:

  • Height: 3cm
  • Length: 6cm
  • Width: 2cm

Volume of a rectangular prism =  Length X Height X Width

=6 X 3 X 2

Volume=36 cubic cm

8 0
4 years ago
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