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Lerok [7]
3 years ago
8

Pls guys help me pls :c​

Mathematics
1 answer:
Vinil7 [7]3 years ago
8 0

Answer: A. x\geq21\dfrac{2}{3} .

Step-by-step explanation:

The given inequation: 81-1\dfrac{1}{5}x\leq55

\Rightarrow\ 81-\dfrac{6}{5}x\leq55

Multiplying 5 on both the sides, we get

5(81-\dfrac{6}{5}x)\leq5\times55\\\\\Rightarrow\ 405-6x\leq275\\\\\Rightarrow\ 6x\geq405-275\\\\\Rightarrow\ 6x\geq130\\\\\Rightarrow\ x\geq\dfrac{130}{6}\\\\\Rightarrow\ x\geq\dfrac{65}{3}\\\\\Rightarrow\ x\geq21\dfrac{2}{3}

Hence, the inequality for x is x\geq21\dfrac{2}{3} .

So, the correct option is A. x\geq21\dfrac{2}{3} ..

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Enjal paid Rs 15,255 for smart phone with 10% discount and 13% vat. Find marked price of that smart phone.​
OlgaM077 [116]

Answer:

The marked price of the smart phone is Rs 15,000.

Step-by-step explanation:

We proceed to explain step by step how to determine the marked price of the  smart phone:

1) Divide the resulting price by the VAR factor:

C' = \frac{C''}{1 + \frac{r}{100} } (1)

Where:

C'' - Resulting price, measured in rupees.

C' - Price of the product after discount, measured in rupees.

r - VAT rate, measured in percentage.

If we know that C'' = 15,255\,INR and r = 13, then the price of the product after discount is:

C' = \frac{15,255\,INR}{1+\frac{13}{100} }

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2) Divide the price of the product after discount by the discount factor:

C = \frac{C'}{1-\frac{r'}{100} } (2)

Where:

C - Marked price of the product, measured in rupees.

r' - Discount rate, measured in percentage.

If we know that C' = 13,500\,INR and r' = 10, then the marked price of the product is:

C = \frac{13,500\,INR}{1-\frac{10}{100} }

C = 15,000\,INR

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Desde el gráfico, se encuentra que hay una probabilidad de 9.9% que el primer usuario que responda la encuesta sea mujer de más de 44 años.

------------------------

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De el gráfico, hay:

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Un problema similar es dado en brainly.com/question/18734831

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