Solving systems of equations
y= x + 2
y= 3x - 2

x = 2

y = 4

Step-by-step explanation:

y = x + 2

y = 3x - 2

From equation one, y = x + 2

So, substitute x + 2 for y into equation two

We have

x + 2 = 3x - 2

Add 2 to both sides of the equation

x + 2 + 2 = 3x - 2 + 2

x + 4 = 3x

Subtract x from both sides

x - x + 4 = 3x - x

4 = 2x

Divide both sides by by 2

4/2 = 2x/2

2 = x

x = 2

Substitute 2 for x in either of the equations to get y.

Using the first equation, we have

y = 2 + 2

y = 4

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