Answer:
The directional derivate is given by: 
Step-by-step explanation:
The directional derivative at point (x,y) is given by:

In which a is the x component of the unit vector and b is the y component of the unit vector.
Vector:
We are given the following vector: 
Its modulus is given by: 
The unit vector is given by each component divided by it's modulus. So

This means that 
Partial derivatives:

So




Directional derivative:


![D_{u}(x,y) = \frac{18}{\ln{17}\sqrt{10}} - \frac{12}{\ln{17}\sqrt{10}}[tex][tex]D_{u}(x,y) = \frac{6}{\ln{17}\sqrt{10}}](https://tex.z-dn.net/?f=D_%7Bu%7D%28x%2Cy%29%20%3D%20%5Cfrac%7B18%7D%7B%5Cln%7B17%7D%5Csqrt%7B10%7D%7D%20-%20%5Cfrac%7B12%7D%7B%5Cln%7B17%7D%5Csqrt%7B10%7D%7D%5Btex%5D%3C%2Fp%3E%3Cp%3E%5Btex%5DD_%7Bu%7D%28x%2Cy%29%20%3D%20%5Cfrac%7B6%7D%7B%5Cln%7B17%7D%5Csqrt%7B10%7D%7D)
The directional derivate is given by: 
2.32, 2 1/3, 2 2/5, 224, 254
3 cans!!!
5x6= 30 (divided by 2= 15)
5x6=30 (divided by 2 = 15)
10x18= 180
180+30= 210
3 cans!!
Answer:
x=−8 and y=−4
Step-by-step explanation:
8x−17y=4;−8x+15y=4
add eqn1 and 2
to eliminate x
you will get y=-4
put it zin eqn 1
x=-8
Answer:
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