Slope = rise/run = 10/50 = 1/5
Answer: 
Move all terms containing y to the left, all other terms to the right
<u>Add -14y to each side of the equation</u>
<u></u>
<u></u>
<u></u>
<u>Combine like terms: 5y + -14y = -9y
</u>
<u></u>
<u></u>
<u></u>
<u>Combine like terms: 14y + -14y = 0
</u>
<u></u>
<u></u>
<u></u>
<u>Add '20' to each side of the equation</u>
<u></u>
<u></u>
<u></u>
<u>Combine like terms: -20 + 20 = 0
</u>
<u></u>
<u></u>
<u></u>
<u>Combine like terms: 7 + 20 = 27
</u>
<u></u>
<u></u>
<u></u>
<u>Divide each side by -9</u>
<u></u>
<u></u>
No.
.. √162 = (√2)*(√81)
.. √81 +√81 = 2√81 = √324
Square root is a non-linear function. sqrt(a +b) ≠ sqrt(a) +sqrt(b)
The answer to this one is simple.
An equation to model with would be
? * 4 = 56.
To find ? All you have to do is divide 56 by 4.
So the answer to your question is 14 miles per hour.
Hope I did this right and hope I helped you :))))