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MArishka [77]
3 years ago
15

A small painting has an area of 400 cm^2. The length is 4 more than twice the width. Find the dimensions of the pool. Solve by c

ompleting the square. Round answers to the nearest tenth.
Mathematics
1 answer:
anygoal [31]3 years ago
6 0
A = l*w
l = 2w + 4
400 = (2w + 4)*w
0 = 2w^2 + 4w - 400

Then use the quadratic equation where a=2, b=4, and c=-400.

w = <span>13.2
l = 30.4
</span>


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Combine like terms.

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x + 3 = 8y

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Express p in terms of q if
Irina-Kira [14]

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2 years ago
Find the markup and the cost of the following item. Round answers to the nearest cent.
marysya [2.9K]

Answer:

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2nd question: M=.22 while C=1.97

Step-by-step explanation:

If a mirror costing x dollars is marked up 30%, then we have to find x such that 30%x+x is 98 dollars.

We are solving:

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Combine like terms:

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C=75.38

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If ream of paper cost x and is marked up 11%, then we have to find x such that 11%x+x is 2.19.

We are solving:

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kow [346]
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3 years ago
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Answer:

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