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The temperature decreased 3 degrees every hour for 4 hours yesterday. How many total degrees did the temperature drop yesterday

Mathematics

1 answer:

Novay_Z [31]3 years ago

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Answer:

Step-by-step explanation:

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Answer:

The width of the frame must be 12 inches (15in by 12in)

Step-by-step explanation:

Given

See attachment for painting and frame

Required

Determine the dimension of the frame

To do this, we make use of the following scale ratio.

$Scale = Length : Width$

For the painting,

$Scale = 20: 16$

For the frame,

$Scale = 15: w$

Since she wants to maintain the same ratio; both scale must be the same.

i.e.

$15 : w = 20 : 16$

Express as fraction

$\frac{w}{15} = \frac{16}{20}$

$\frac{w}{15} = 0.8$

Make w the subject

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<em>The width of the frame must be 12 inches i.e. 15in by 12in frame</em>

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3 years ago

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Answer:

x^2+2x-5 - 1/x

Step-by-step explanation:

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Use Pythagorean Theorem: a^2+b^2=c^2.

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