Solve the system by substitution.
9x + 7y = 33
-6x = y

x= -1, y= 6

Step-by-step explanation:

9x + 7y =33---a

-6x = y---b

Put b into a,

9x + 7(-6x) = 33

9x - 42x = 33

-33x = 33

x = -1c

put c into b,

-6(-1) = y

y=6

The answer is (-1, -6)

Step-by-step explanation:

To get y by itself, you switch sides of the Y and the -6x

9x+7y=33

y= -6x

You then put the -6x where the y is

9x+ 7(-6x) = 33

9x -42x =33         9 -42 = -33

-33x = 33

It's now a one-step equation

x= -1

Now you put  the x value (-1) where the x is in y= 6x

y= 6 (-1)    y=-6

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles