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2 years ago

13

Find BC if B(8, -7) and C(-4, -2).

1 answer:

polet [3.4K]2 years ago

4 0

4, -8

add the x's and add the y's

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How do I solve w(x)=4x+5; find w(-8)?

madam [21]

W(x) = 4x + 5

w(-8) = 4(-8) + 5 = -32 + 5 = -27

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3 years ago

Suppose f(x, y) is a differentiable function of x and y and let g(r, s) = f (2rs, 8s − 2r). Use

worty [1.4K]

By the chain rule,

$\dfrac{\partial g}{\partial r} = \dfrac{\partial f}{\partial r} \\\\ ~~~~~ = \dfrac{\partial f}{\partial x} \dfrac{\partial x}{\partial r} + \dfrac{\partial f}{\partial y} \dfrac{\partial y}{\partial r} \\\\ ~~~~~ = 2 s \dfrac{\partial f}{\partial x} - 2 \dfrac{\partial f}{\partial y}$

where $x(r,s)=2rs$ and $y(r,s)=8s-2r$ .

If $r=2$ and $s=1$ , then

$x = 2\cdot2\cdot1 = 4$

$y=8\cdot1-2\cdot2 = 4$

so that

$g_r(2,1) = 2\cdot1 f_x(4,4) - 2 f_y(4,4) = 2\cdot2-2\cdot3 = \boxed{-2}$

5 0

5 months ago

Translate this sentence into an equation.

aliya0001 [1]

Answer:

20+h = 46

Step-by-step explanation:

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