3 years ago

Graph this please −9x+4y≤8

Mathematics

1 answer:

Tamiku [17]3 years ago

5 0

You can also use desmos to find any graphing type of equations

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The length of a rectangle is twice the width. the perimeter is 32 cm more than the width. find the dimensions of the rectangle.

SCORPION-xisa [38]

Width: x
Length: 2x
Perimeter=2x+2x+x+x=6x
32 cm more than width means x+32
6x=x+32
5x=32
x=6.4
Dimension is 6.4×12.8 (width×length)

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4 years ago

In which graph is y a linear function of x will mark brainest ty so much

pentagon [3]

a? I'm unsure abt this one

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3 years ago

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3 years ago

Hey guys. Just need help checking my equation. I have x = -0.6. thanks.

Novosadov [1.4K]

$12 - 4( - 3x + 5) - 8x = 20 \\ 12 + 12x - 20 - 8x = 20 \\ 4x - 8 = 20 \\ 4x = 28 \\ x = 7$
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3 years ago

Hey guys, real fast<br><br><br> how is the derivative of 3xlnx = 3+ln(x^3)

Harman [31]

You will need to use product rule.
The product rule is:
$\frac{d}{dx}[f(x)g(x)] = f'(x)g(x)+f(x)g'(x)$

$\frac{d}{dx}( 3x \ln x) =( \frac{d}{dx}(3x) \cdot \ln x )+ (3x \cdot \frac{d}{dx}(\ln x))\\\\ = 3\ln x + 3x\cdot \frac{1}{x}\\\\=3 \ln x + 3$

This can also be written as (using the log rules):
$3 \ln x + 3 = \boxed{\ln(x^3) + 3}$

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3 years ago