What do you mean??????
there is no question...
Answer:
The lines are perpendicular
Step-by-step explanation:
we know that
If two lines are parallel, then their slopes are equal
If two lines are perpendicular, then their slopes are opposite reciprocal (the product of their slopes is equal to -1)
we have
----> equation A
isolate the variable y
Divide by 7 both sides

The slope of the line A is 
----> equation B
isolate the variable y
Divide by 3 both sides

The slope of the line B is 
Compare the slope of both lines


so
----> the lines are not parallel
Find the product of the slopes
----> the lines are perpendicular
Answer:
not sure
Step-by-step explanation:
but yes school sucks ΔABC ~ ΔEFD
Answer:
Let the mass of nickle be 3x
And the mass of chromium be 2x
According to question,
3x+2x = 250
5x = 250
x =250/5
x = 50