Step-by-step explanation: 6hours= 60*6=360
360:30
12:1
Answer:
slope = - 
Step-by-step explanation:
The equation of a line in slope0 intercept form is
y = mx + c ( m is the slope and c the y- intercept )
y = -
x + 9 ← is in slope- intercept form
with slope m = - 
Answer:
Step-by-step explanation:
Let
be the greater number and
be the smaller number. We know that their difference is 15, so we have

Then, we have the following information: if we add twice the greater (2x) and 8 (2x+8), the result is 3 times the lesser (3y) minus four (3y-4). So, we have

So, we have the follwing system:

From the first equation, we can derive
, and substitute this expression in the second equation to get

Substitute this value for y in the first equation to get
