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3 years ago

-4x .- 9y = 1 -x + 2y = -4

1 answer:

sveta [45]3 years ago

5 0

Answer: The answer for the first one is x=1/36y and the second one is

y=1/2x-2

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pantera1 [17]

Answer:

Step-by-step explanation:

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3 years ago

Archy [21]

The fraction that is represented by point A of the number line shown is $1\frac{1}{3}$

5 0

2 years ago

ivanzaharov [21]

Answer:

Step-by-step explanation:

6 0

3 years ago

nata0808 [166]

I suspect 4/2 should actually be 4/3, since 4/2 = 2, while 4/3 would make V the volume of a sphere with radius r. But I'll stick with what's given:

$\displaystyle \frac{dV}{dr} = \lim_{h\to0} \frac{2\pi(r+h)^3-2\pi r^3}{h}$

$\displaystyle \frac{dV}{dr} = 2\pi \lim_{h\to0} \frac{(r^3+3r^2h+3rh^2+h^3)- r^3}{h}$

$\displaystyle \frac{dV}{dr} = 2\pi \lim_{h\to0} \frac{3r^2h+3rh^2+h^3}{h}$

$\displaystyle \frac{dV}{dr} = 2\pi \lim_{h\to0} (3r^2+3rh+h^2)$

$\displaystyle \frac{dV}{dr} = 2\pi \cdot 3r^2 = \boxed{6\pi r^2}$

In Mathematica, you can check this result via

D[4/2*Pi*r^3, r]

3 0

3 years ago

mafiozo [28]

${n}^{2} - 2n - 1 > 0$
$n = 3 > > 9 - 6 - 1 = 2 > 0$
suppose the following is true

7 0

3 years ago