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3 years ago

8

You plan to study for at least 1.5 hours for a geography test. Write an inequality that represents this situation. please help m

e out

1 answer:

kifflom [539]3 years ago

6 0

2.5 hours for the inequality in the situation

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I didn't learn this. Sorry

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3 years ago

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Here is a floor a plan house . Approximate length of the wall are given , what is the approximate area of the home, including th

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Step-by-step explanation:

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3 years ago

Given that 3^x = 4^y = 12^z, show that z = (xy)/(x+y).

irinina [24]

$3^{x} = 4^{y} = 12^{z}$
$3^{x} = 4^{y} = (4 \cdot 3)^{z}$
$3^{x} = 4^{y} = 4^{z} \cdot 3^{z}$

$\text{Let a } = 3^{x} = 4^{y} = 4^{z} \cdot 3^{z}$
$log_3a = x$
$log_4a = y$
$log_{(4 \cdot 3)}a = z$

Using change of base:
$x = \frac{lna}{ln3}$
$y = \frac{lna}{ln4}$
$z = \frac{lna}{ln(4 \cdot 3)}$

$ln3 = \frac{lna}{x}$
$ln4 = \frac{lna}{y}$
$ln(4 \cdot 3) = \frac{lna}{z}$

Now, ln(4 · 3) = ln(4) + ln(3)

$\frac{lna}{z} = \frac{lna}{x} + \frac{lna}{y}$
$\frac{1}{z} = \frac{1}{x} + \frac{1}{y}$
$\frac{1}{z} = \frac{x + y}{xy}$

$\therefore z = \frac{xy}{x + y}$

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4 years ago

HELLP<br> What is the formula for finding the perimeter of a polygon?

Kaylis [27]

Answer:

P=n*s

Step-by-step explanation:

n is the number of sides and s is the length of any one side.

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3 years ago

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There were m visitors in an exhibition on the first day and 1,200 fewer vistors on the second day. On the third day, the number

STALIN [3.7K]

Answer:

Step-by-step explanation:

The average number is given by :

[m + (m - 1200) + (m - 1200)(1.30 ] / 3 =

[ 2m + 1.30m - 1200 - 1560] / 3 =

[3.3m - 2760] / 3 =

[1.1 m - 920 ]

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3 years ago