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3 years ago

How would you work out this equation? 4x+3y=-23 -2x-3y=25

Mathematics

1 answer:

tigry1 [53]3 years ago

7 0

You need to move your contents e.I. 3,4,5 and your variables e.I.2x, 5y, 2z first

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To calculate the area of a circle, you may use a formula. True False

Whitepunk [10]

Answer:

True

Step-by-step explanation:

The formula for an area of a circle is a = pi times radius squared

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3 years ago

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Write the sentence as an inequality.

KiRa [710]

Answer:

1. n + 7 ≤ 9

2. 3w < 18

3. 3 < s + 4

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1 year ago

O<br> Decrease 40 by ratio of 4:5

Reika [66]

A decrease in the ratio 4:5 implies that :

New quantity:Old quantity = 4:5

Let the new quantity be $\bf \: x$

$\bf∴ x : 40 = 4:5$

$= > \bf \frac{x}{40} = \frac{4}{5}$

$\bf = > 40 \times \frac{x}{40} = 40 \times \frac{4}{5}$

$\bf = > x = 8 \times 4$

$\bf = > x = 32$

So, the new quantity is 32

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3 years ago

Sleep apnea: Sleep apnea is a disorder in which there are pauses in breathing during sleep. People with this condition must w up

bonufazy [111]

Answer:The required interval is (0.196, 0.030).

Step-by-step explanation:

Since we have given that

n = 432

x = 108

So, $\hat{p}=\dfrac{x}{n}=\dfrac{108}{432}=0.25$

at 99% level of confidence, z = 2.576

So, Margin of error would be

$z\times \sqrt{\dfrac{pq}{n}}\\\\=2.576\times \sqrt{\dfrac{0.25\times 0.75}{432}}\\\\=2.576\times 0.021\\\\=0.0536$

So, margin of error = 0.0536

Now, confidence interval would be

$\hat{p}\pm 0.0536\\\\=(0.25-0.0536,0.25+0.0536)\\\\=(0.1964,0.3036)\\\\\approx (0.196,0.030)$

Hence, the required interval is (0.196, 0.030).

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3 years ago

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Please help me with my problem

Doss [256]

D and F are not equivalent to ax+bx+ac+bc+

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3 years ago