3 years ago

The price of a necklace was reduced from $30 to $21. By what percentage was the price of the necklace reduced

Mathematics

1 answer:

grigory [225]3 years ago

3 0

Answer:

= 30% decrease

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1.)Two polynomials P and D are given. Use either synthetic or long division to divide

Ksenya-84 [330]

Answer:

For 3: 6x^4+25x^3+28x^2-x-10

Step-by-step explanation:

This is the multiplied form of (2x-1)(x+1)(x+2)(3x+5)

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7 0

3 years ago

A business knew that 30%, percent of its customers were less than 25 years old. The business wanted to increase this percentage,

jeyben [28]

Answer:

The answer is "0.9258201 or $\bold{ \frac{0.36 -0.3}{\sqrt{\frac{0.3 \times 0.7 }{50}}}}$ ".

Step-by-step explanation:

$\to P= 30 \ \%\\\\ \to x= 18 \\\\ \to n=50\\\\\\\hat p= \frac{x}{n} = \frac{18}{50} = 0.36 \\\\\bold{Formula:}\\\\X= \frac{\hat p -p}{\sqrt{\frac{p \times (1-p)}{n}}}\\\\$

$= \frac{0.36 -0.3}{\sqrt{\frac{0.3 \times (1-0.3)}{50}}}\\\\= \frac{0.36 -0.3}{\sqrt{\frac{0.3 \times 0.7 }{50}}}\\\\= \frac{0.36 -0.3}{\sqrt{\frac{0.21}{50}}}\\\\= \frac{0.06}{\sqrt{0.0042}}\\\\= \frac{0.06}{0.064807407}\\\\= 0.9258201$