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Kobotan [32]
3 years ago
11

The perimeter of a rectangle is 16 inches. The equation that represents the perimeter of the rectangle is 2l + 2w = 16, where l

represents the length of the rectangle and w represents the width of the rectangle. Which value is possible for the length of the rectangle?
Mathematics
1 answer:
Svetlanka [38]3 years ago
7 0
2(l+w)=16
l+w=16:2
l+w=8

for l>w

l=7, w=1
l=6, w=2
l=5, w=3 
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What is the percent of decrease from 200 to 110? A. 45% B. 55% C. 82% D. 90%
strojnjashka [21]
A) 45%, (100-200)/200=0.45 which also equals 45% :) 
8 0
3 years ago
A commercial jet and a private airplane fly from Denver to Phoenix. It takes the commercial jet 1.1 hours for the flight, and it
FinnZ [79.3K]

Answer:

The speed of the private airplane is 770 mph, the speed of the commercial airplane is 980 mph.

Step-by-step explanation:

Let x mph be the speed of private airplane. If the speed of the commercial jet is 210 miles per hour faster than the speed of the private airplane, then the speed of commercial airplane is (x+210) mph.

It takes the commercial jet 1.1 hours for the flight, then it covered the distance of

1.1(x+210)\ miles

It takes the private airplane 1.8 hours for the flight, then it covered the distance of

1.8x\ miles.

The distances are the same, so

1.1(x+210)=1.8x\\ \\1.1x+231=1.8x\\ \\1.8x-1.1x=231\\ \\0.7x=231\\ \\7x=2,310\\ \\x=770

The speed of the private airplane is 770 mph, the speed of the commercial airplane is 770 + 210 = 980 mph.

3 0
3 years ago
Read 2 more answers
Please show how you got your answer to the problem.<br> 4/5 + 3/15 - 2/3 =
natta225 [31]

Answer:

Simplified Answer: 1/3 Non-Simplified Answer: 5/15

Step-by-step explanation:

Make every fraction have a common denominator:

4/5 * 3/3 = 12/15

3/15 = 3/15

2/3 * 5/5 = 10/15

Add and/or Subtract the numerator(s):

12 + 3 = 15

15 - 10 = 5

Place the final numerator over the denominator (Non-simplified Answer):

5/15

Simplify (What can you divide the numerator and the denominator by to make the fraction into it's simplest from without any remainders?):

5 goes into both 5 and 15.

5/15 divided by 5 = 1/3

Simplified Answer:

1/3

5 0
3 years ago
The number 37 is a prime or a composite
Leya [2.2K]
Prime
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Prime has only one number that equals that number

For example: 37x1= 37
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4 0
2 years ago
Read 2 more answers
The strength of an aluminum alloy is normally distributed with mean 10 gigapascals (GPa) and standard deviation 1.4 GPa. What is
tensa zangetsu [6.8K]

Answer:

The first quartile of the strengths of this alloy is 9.055 GPa.

Step-by-step explanation:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

The strength of an aluminum alloy is normally distributed with mean 10 gigapascals (GPa) and standard deviation 1.4 GPa.

This means that \mu = 10, \sigma = 1.4

What is the first [lower] quartile of the strengths of this alloy?

This is the 100/4 = 25th percentile, which is X when Z has a pvalue of 0.25, so X when Z = -0.675.

Z = \frac{X - \mu}{\sigma}

-0.675 = \frac{X - 10}{1.4}

X - 10 = -0.675*1.4

X = 9.055

The first quartile of the strengths of this alloy is 9.055 GPa.

3 0
3 years ago
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