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shepuryov [24]
3 years ago
13

Find an equivalent system of equations for the following system: 3x + 3y = 0 −4x + 4y = −8

Mathematics
1 answer:
Rama09 [41]3 years ago
3 0

Answer:

Answer:

3x + 3y = 0

7x - y = 8

Step-by-step explanation:

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Solve the system by substitution<br> -x - y - z= -8<br> -4x + 4y + 5z = 7<br> 2x + 2z = 4
Stella [2.4K]

First:

2x + 2z = 4

2(x+z)=4

x+z=4/2

x=2-z

-x - y - z=  -8

-(2-z)-y-z= -8         replace x

-2+z-y-z= -8          (cancel z)

-2-y= -8

6 = y

Then:

-4x + 4y + 5z = 7  replace x and y

-4(2-z)+4*6 + 5z = 7

-8 + 4z + 24 + 5z = 7

16 + 9z = 7

9z = 7 - 16

9z = -9

z = -9/9

z= -1

Finally

x= 2-z  replace z

x = 2- (-1)

x = 3

5 0
3 years ago
Which of the following is not a tool for monitoring your finances?
Akimi4 [234]

You may want to take this question over to the business category though I believe the answer is C.

The others show how your money is moving, how it's being spent, where you plan on spending it, how much you save, etc. Wouldn't think liability is one of those.

4 0
3 years ago
Which statements could you use to conclude that JKLM is a parallelogram
frez [133]

Parallelogram: opposite angles are equal ; opposite sides are equal

<JML = <LKJ and <MJK = <MLK

Answer is the second option (opposite angles are equal)

<JML = <LKJ and <MJK = <MLK

5 0
3 years ago
Read 2 more answers
You are riding a train. Your carry-on bag can weigh no more than 50 pounds. Your bag weighs 38 pounds.
Sladkaya [172]

Answer:

Let the additional weight that can be added be = x

Current weight of the bag = 38 pounds

Total weight can be = 50 pounds

The equation becomes:

38+x < or equal 50

x < or equal 50-38=12

Hence, a weight of 12 pounds cab be added to the current wight.

6 0
3 years ago
50% of 320 is equal to 80% of what number?
melisa1 [442]

Answer:

128

Step-by-step explanation:

8 0
3 years ago
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