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Darina [25.2K]
3 years ago
10

I need to solve these systems using substitution.

Mathematics
1 answer:
Georgia [21]3 years ago
8 0

y is some number and it is equal to -4x+2

y being that same number is also equal to x-3

therefore, we can equate -4x+2 and x-3 to get x-3 = -4x+2

This is the same as starting with y = -4x+2 and replacing the y with x-3

----------------

Let's solve for x

x-3 = -4x+2

x-3+4x = -4x+2+4x .... add 4x to both sides

5x-3 = 2

5x-3+3 = 2+3 .... add 3 to both sides

5x = 5

5x/5 = 5/5 .... divide both sides by 5

x = 1

With this x value, you can now find the y value. Pick any equation that has x and y in it. If we picked the first equation, then

y = -4x+2

y = -4*1+2 ... plug in x = 1

y = -4+2

y = -2

Or we can pick the second equation

y = x-3

y = 1-3 .... plug in x = 1

y = -2

-------------------------------------------------------------------------

<h3>The solution to the system is (x,y) = (1, -2)</h3>

Graphing the two lines will have them intersect at this location.

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3 years ago
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andrew11 [14]

Answer:

Sometimes

Step-by-step explanation:

When x is a nonzero integer, then x can be

  • negative;
  • positive.

If x is negative, then -3x is positive (multiplying negative number by -3 you get positive number).

If x is positive, then -3x is negative (multiplying positive number by -3 you get negative number).

So, the statement "When x is a nonzero integer, the quantity -3x will be negative" is sometimes true.

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3 years ago
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natita [175]

Answer:

b

Step-by-step explanation:

  1. 6350+5745+11870+15255+26432=65652
  2. 65652÷5=13130.4
3 0
2 years ago
What is the greatest possible error if Irina measured the length of her window as 3.35 feet?
Tatiana [17]
Is it a written response or a multiple chose question?
7 0
3 years ago
Can you do 0.123-0.3 PLEASE TELL ME THE ANSWER!!PLS
IRINA_888 [86]

Answer:

hi

Step-by-step explanation:

it is -0,177

hope it helps

have a nice day

6 0
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