Please help ill give brainliest

Mathematics

2 answers:

maks197457 [2]2 years ago

6 0

Answer:

170

Step-by-step explanation:

1. change 15% to decimal - 0.15

2. multiply it by the regular price ($200) - 0.15 x 200 = 30

3. subtract the regular price by the discounted price - 200 - 30 = 170

I really hope this helps :)

tekilochka [14]2 years ago

4 0

Answer:

i just want points

Step-by-step explanation:

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Olenka [21]

Answer:

$g_{r}(\sqrt{2},\frac{\pi}{4})=\frac{\sqrt{2}}{2}\\$

Step-by-step explanation:

First, notice that:

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$g(\sqrt{2},\frac{\pi}{4})=f(\sqrt{2}(\frac{1}{\sqrt{2}}),\sqrt{2}(\frac{1}{\sqrt{2}}))\\$

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We proceed to use the chain rule to find $g_{r}(\sqrt{2},\frac{\pi}{4})$ using the fact that $X(r,\theta)=rcos(\theta)\ and\ Y(r,\theta)=rsin(\theta)$ to find their derivatives:

$g_{r}(r,\theta)=f_{r}(rcos(\theta),rsin(\theta))=f_{x}( rcos(\theta),rsin(\theta))\frac{\delta x}{\delta r}(r,\theta)+f_{y}(rcos(\theta),rsin(\theta))\frac{\delta y}{\delta r}(r,\theta)\\$