Write an inequality to respresent the situation.

Mathematics

1 answer:

nasty-shy [4]3 years ago

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Answer:

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Molly owes her brother $300.She works for $10 per hour as a checker at the local grocery store.Molly plans to repay her brother

gavmur [86]

Answer: The expression which represents the condition described is given as $4x=300$

Step-by-step explanation:

Since we have given that

Amount that Molly owes her brother = $300

Let the number of hours she worked as a checker be x

Cost of per hour = $10

Amount she get after doing work for x hours is given by

$10x$

Rate of tax are taken out = 80%

So, amount she left with is given by

$\frac{100-20}{100}\times 10x\\\\=\frac{80}{100}\times 10x\\\\=8x$

So, Molly plans to repay her brother half of what she earns is given by

$\frac{8x}{2}=4x$

According to question,

$4x=300\\\\x=\frac{300}{4}\\\\x=75\ hours$

So, the expression which represents the condition described is given as

$4x=300$

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4 years ago

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Megan’s TV had a base price of $189 and the sales tax was 6. 88%. Over the next four years, the TV consumed an average of $0. 06

andreyandreev [35.5K]

Lifetime cost of Megan's TV is sum of base price, tax, electricity cost and repair cost. The lifetime cost of Megan’s TV is $347.

<h3>What is lifetime cost of a product?</h3>

Lifetime cost it the overall cost of the product, which is expend over it during its service including base price, service charge, fuel charge etc.

Given information-

The base price of the TV is $189.

The daily consumption of electricity by the YV is$0.06

The cost of repairs each time is $29.

As The base price of the TV is $189 and the sales tax on it was 6.88 percent Thus the total base price of the TV at the time of buy is,

$C_b=189\times\dfrac{106.88}{100}\\C_b=202.0032$

Thus, the total base price of the TV at the time of buy is $202.0032.

As The daily consumption of electricity by the YV is$0.06. Thus the total cost of electricity used by TV in four years (including one leap year) is,

$C_E=0.06\times(3\times365+366)\\C_E=87.66$