-1/3 slope will make another perpendicular line
Answer:
Dependent
Step-by-step explanation:
and 
Lets solve the second equation for y and then substitute it in first equation

Subtract 6x on both sides

Divide by 2 on both sides

Now we plug it in first equation for y

Add 3x on both sides

Both sides are same, they are equal. the system has infinite solutions.
They are said to be dependent
Answer:
x=20
Step-by-step explanation:
3x - 10 + 5x + 30 = 180
8x + 20 = 180
8x = 160
x = 160/8
x = 20
check:
3(20) - 10 + 5(20) + 30 = 180
60 - 10 + 100 + 30 = 180
50 + 100 + 30 = 180
150 + 30 = 180
180 = 180 ✓
The first mistake was in the 6x + 14 = -4 Line as -12x + 6x is -6x and not 6x.
Answer:
12.5m
Step-by-step explanation:
We attack this by forming ratios
If the woman who is 5ft casts a 4ft long shadow, we have
5:4
x:10
cross multiply
4x = 50
x = 50/4
x = 12.5m