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3 years ago

The length of a rectangle is 3 cm longer than its width. if the perimeter of the rectangle is 66 cm , find its length and width.

Mathematics

2 answers:

garik1379 [7]3 years ago

5 0

Just multiply the 66cm x 3cm =198

BaLLatris [955]3 years ago

4 0

P=66
L=w+6

P= 2(w+3)+2(w)
66= 2(w+3)+2(w)
66=2w+6+2w
66=4w+6
60=4w
15=w
L=18(15+3)

The width is 15
The length is 18

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3 years ago

Simplify each.Assume that none of the variables is zero.

Zanzabum

Answer:

2. 1 / a^2

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Step-by-step explanation:

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3 0

2 years ago

he temperature at noon on a winter day was 2 °F. By 6 p.m., the temperature had dropped to −9 °F. Write a subtraction expression

nydimaria [60]

Based on the starting temperature and the new temperature, the relevant expression would be 2 - (-9)

To find the number of degrees the temperature has changed by, use the following equation:

= Starting temperature - Current temperature

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Current temperature = -9°F

The equation becomes:

= 2 - (-9)

In conclusion, the expression would be 2 - (-9)

Find out more on expressions at brainly.com/question/945593.

5 0

2 years ago

The brain volumes ?( cm cubed cm3?) of 20 brains have a mean of 1083.9 1083.9 cm cubed cm3 and a standard deviation of 122.2 122

Colt1911 [192]

Answer:

Range: (844.9,1333.7)

A brain volume of 1348.3 cm cubed can be considered significantly high.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 1083.9 cm cubed

Standard Deviation, σ = 122.2 cm cubed

Range rule thumb:

This rule state that the the range of data is four times the standard deviation of the data.

$\text{Range} = 4\times \sigma = 4\times 122.2 = 488.8$

Upper Limit:

$\mu + 2\sigma = 1089.3 + 2(122.2) = 1333.7$

Lower limit:

$\mu - 2\sigma = 1089.3 - 2(122.2) = 844.9$

Since, 1348.3 does not lie in the range (844.9,1333.7), a brain volume of 1348.3 cm cubed can be considered significantly high.

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3 years ago