Answer:
Step-by-step explanation:
Answer:
y= = -3x -11
STANDARD FORM: 3x+y= -11
Step-by-step explanation:
1/2 b-39=101
+39 +39
1/2 b= 140
2(1/2) b= 140(2)
b=280
Say x is the number of weeks until their money is equal. Then, we can set up an equation.
400 + 25x = 250 + 75x
Subtract 250 from both sides
150 + 25x = 75x
Subtract 25x from both sides
150 = 50x
Divide by 50 on both sides
3 = x
That means the answer is 3 weeks.
The first line is perpendicular, the second line is not perpendicular and not parallel , the third line is parallel to the above line and the forth line not parallel or perpendicular to the line.
<h3>How can the slope of the line be calculate?</h3>
The slope of the line is been given as −3x+5y=−15
Then
, hence the slope is 
- Slope of the first line 5x + 3y = 15 after calculation is
the slope is 
this means that the line is perpendicular to the given line
- Slope of the second line 3x + 5y = 15 after calculation is

This means that the line is not perpendicular and not parallel
- Slope of the Third line -3x + 5y = 15 can be calculated as

This means that the line is parallel to the above line.
- Slope of the first line 3x + 5y = 15 after calculation is

This means that the line is not parallel or perpendicular to the line
Learn more about slope of line at:
brainly.com/question/3493733
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