Answer:
step 3: he should have divided both sides by -7
Answer:
A
Step-by-step explanation:
That is the procedure above
Sub
b=3a so put 3a for every b
c=5a so put 5a for every c
a+3a+5a=180
9a=180
divide 9 both sides
a=20
b=3a
b=3(20)
b=60
Answer:
y int is 6
the slope is -5
Step-by-step explanation:
you write the equation out to slope intercept form, which is y=-5x+6
-5 is the slope because thats the transformation x goes through
6 is the constant which is the y intercept
20(7.5*10^-2)
the *10^-2 means we move the decimal of 7.5 2 places to the left
20(.075)
=1.5