Solve the system of equations: y = x-4 -2x + y = 18

Mathematics

1 answer:

Pie3 years ago

6 0

Answer:

x = 7.3

Step-by-step explanation:

-2x + x-4 = 18

First, Combine Like Terms

-3x + (-4) = 18

Then, do Inverse Operations

-3x + -4 = 18

+ 4 +4

Cancel out the -4 +4 because it will equal zero and won't matter to the equation

-3x = 22

Do Inverse Operations again. In this case, you will divide.

-3x = 22

-3x/-3 = 22/-3

Cancel out the -3x/-3

22/-3 = x

7.3 = x

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PLS HELP any hints appericated(40 Points)

Viefleur [7K]

Answer:

See below

Step-by-step explanation:

1) Solve the equation: [4ax - (a + b)](a + b) = 0, where a and b are constants.

if a + b = 0, then x has infinitely many solutions

4ax = a + b
x = (a + b)/4a, a≠0

2) Solve the equation m²x + 1 = m(x + 1), where m is a parameter.

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3 0

3 years ago

What is the equation of a line with a slope of 3 and a point (3, 1) on the line?

topjm [15]

The equation of a line that passes through the point (x1,y1) and has a slope of m is
y-y1=m(x-x1)
given
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3 years ago

Gina has a $50 gift card to a bagel shop. Each Friday, she purchases breakfast for $6. She created a graph to represent the amou

Ghella [55]

Answer:

No, because the amount of money on her gift card should decrease each week.

Step-by-step explanation:

Well, the graph shows that the slope is increasing, if you got $50.00 and spend $6.00 each Friday, wouldn't that be decrease and not increase? This is why we eliminate the yes options. Lastly, of course, they should not start at the origin as they started at $50.00.

Proof I got it correct: