Hello :
solve : <span> x/3-12=1
</span><span> x/3 = 13
x = 13×3
x = 39
</span>
The tangent line to the curve has slope equal to 
at the point (2, -1). We have, by implicit differentiation,
At the point (2, -1), the slope is then 2/9, so the tangent line has equation
280 miles - is that the round trip or one way?
280 one way
boat velocity = 30 mph
current velocity = 10 mph
280 (140 one way)
boat velocity = 15 mph
current velocity = 5 mph
Calculator for traveling with against current:
http://www.1728.org/veloccal.htm
A factor is one part of a product.
In the given expression first we separate the terms.
here we have two terms: 15 and 20x
factors of first term 15 : since just one number is there so factors of 15 would be 1, 3, 5 and 15
factors of second term 20x: product of 20 and x gives 20x, so factors of 20x are 1,2,4,5, 10,20 and x
You will need to add 3 to each side.
x^2-3=15
+3 +3
x^2=12
and go from there
