those lines mean "absolute value of"
if you thought of it like money "I have $20" the value is $20
but if you owed $20 you would have -$20 but the total value to the economy is still $20
this means that I A I is [6 3 2 3]
y = -
x - 1
the equation of a line in slope-intercept form is
y = mx + c ( m is the slope and c the y-intercept )
rearrange - 7x + 5y = 12 into this form
add 7x to both sides
5y = 7x + 12 ( divide all terms by 5 )
y =
x +
← in slope- intercept form
with slope m = 
given a line with slope m then the slope of a line perpendicular to it is
perpendicular slope = -
= - 
The partial equation of the perpendicular line is
y = -
x + c
to find c substitute (- 7, 4 ) into the partial equation
4 = 5 + c ⇒ c = 4 - 5 = - 1
y = -
x - 1 ← in slope- intercept form
Answer:

Step-by-step explanation:

Answer:
nice.
Step-by-step explanation:
Answer:
x = 33
y = 38
z =109
Step-by-step explanation: