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cluponka [151]
3 years ago
15

A dress that costs x dollars is on sale for 30% off. Write an expression to represent the sale price, in dollars, of the dress.

Mathematics
1 answer:
Bogdan [553]3 years ago
4 0

The expression to represent the sale price, in dollars, of the dress is x - 0.3x dollars

<h3><u>Solution:</u></h3>

Given that dress that costs "x" dollars is on sale for 30% off

To find: expression to represent the sale price, in dollars, of the dress

Let the original price of dress is "x"

It is on sale for 30% offer. Which means 30 % of "x" is offer price

Sales price means the price of dress after offer

So the sales price is written as original price - offer price

Sales price = original price - offer price

Sales price = x - 30 % of x

On simplification we get,

\text {Sales price }=x-\frac{30}{100} \times x=x-0.3 x

Thus the sales price of dress is x - 0.3x dollars

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The population of a town has approximately doubled every 17 years since 1950.

the equation P=P_02^k where Po is the population of the town in 1950, is used to model the population, P, of the town t years after 1950.

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for 1 year

The equation becomes

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Our original equation is

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equating expression 1  and 2

P_02^\frac{t}{17}=P_{0}2^k

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2^\frac{t}{17}=2^{k}

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⇒k=t/17 is the solution.






4 0
3 years ago
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A (4,1); B (0,-2)

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Answer:

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