Answer:
x = -2
, y = 3
Step-by-step explanation:
Solve the following system:
{4 x + 5 y = 7
y = 3 x + 9
Hint: | Perform a substitution.
Substitute y = 3 x + 9 into the first equation:
{4 x + 5 (3 x + 9) = 7
y = 3 x + 9
Hint: | Expand the left hand side of the equation 4 x + 5 (3 x + 9) = 7.
4 x + 5 (3 x + 9) = (15 x + 45) + 4 x = 19 x + 45:
{19 x + 45 = 7
y = 3 x + 9
Hint: | Choose an equation and a variable to solve for.
In the first equation, look to solve for x:
{19 x + 45 = 7
y = 3 x + 9
Hint: | Isolate terms with x to the left hand side.
Subtract 45 from both sides:
{19 x = -38
y = 3 x + 9
Hint: | Solve for x.
Divide both sides by 19:
{x = -2
y = 3 x + 9
Hint: | Perform a back substitution.
Substitute x = -2 into the second equation:
Answer: {x = -2
, y = 3
Considering it's concept, it is found that the net worth of the individual is given by:
D) $26,595.
<h3>What is the net worth of an individual?</h3>
It is given by the <u>sum of the individual assets subtracted by the sum of it's liabilities</u>.
Researching the problem on the internet, we have that:
- The sum of the assets, in dollars, is of 545 + 165000 + 6100 = 171645.
- The sum of the liabilities, in dollars, is of 144000 + 1050 = 145050.
Hence, his net worth is given by:
N = 171645 - 145050 = $26,595.
More can be learned about net worth at brainly.com/question/12371230
Answer:
substitution method
x = 7
y = 2
Step-by-step explanation:
2x - 2y = 10
x = 7
substitute for x:
2(7) - 2y = 10
14 - 2y = 10
subtract 14 from each side of the equation:
-2y = -4
divide both sides by -2:
y = 2
Answer:
tbh I think its the middle one
Step-by-step explanation:
Answer:
12.6
Step-by-step explanation:
sorry only first one
