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Lemur [1.5K]
2 years ago
8

A system of two equations has no solution. One equation is -15x+y=18.

Mathematics
1 answer:
DerKrebs [107]2 years ago
5 0

A.

If you multiply the original equation by 3 you get -45x+3y=54, which is the exact same as A, therefore they have infinite solutions.

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Which of these numbers is closest to the golden ratio? 1.16, 1.29, 1.62, 1.98
kondor19780726 [428]

since the golden ratio its 1.618 I believe it would be 1.62
3 0
3 years ago
Listed below are prices in dollars for one night at different hotels in a certain region. Find the​ range, variance, and standar
Artyom0805 [142]

Answer:

Range = 115$

Standard Deviation = 43.76$

Variance = 1915.142$

Option  A) The measures of variation are not very useful because when searching for a​ room, low​ prices, location, and good accommodations are more important than the amount of variation in the area.

Step-by-step explanation:

We are given the data for  prices in dollars for one night at different hotels in a certain region.

234, 160, 119, 131, 218, 207, 146, 141        

Range:

Sorted data: 119, 131, 141, 146, 160, 207, 218, 234

\text{Range} = 234-119 = 115\$

Standard Deviation:

\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}  

where x_i are data points, \bar{x} is the mean and n is the number of observations.  

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

Mean =\displaystyle\frac{1356}{8} = 169.5

Sum of squares of differences = 4160.25 + 90.25 + 2550.25 + 1482.25 +  2352.25 + 1406.25 + 552.25 + 812.25 = 13406

\sigma = \sqrt{\dfrac{13406}{7}} = 43.76\$

Variance =

\sigma^2 = 1915.142\$

Measure of variance for someone searching for room:

Option  A) The measures of variation are not very useful because when searching for a​ room, low​ prices, location, and good accommodations are more important than the amount of variation in the area.

5 0
3 years ago
1/4(r-5/2)=1/8 i need an answer cant figure it out
san4es73 [151]
1/4(r - 5/2) = 1/8
Divide both sides by 1/8 :0
2(r - 5/2) = 1
r - 5/2 = 1/2
r = 1/2 + 5/2 = 6/2

r = 3 Answer
5 0
3 years ago
Read 2 more answers
A text book cost 65.49$ before tax. the tax on the textbook is 6.5%.what is the total cost of the textbook.
trapecia [35]
6.5% tax on $65.49=0.065×65.49=$4.26 To the nearest cent, so add this to 65.49=$69.75.
6 0
3 years ago
22 pts PLEASE HELP ASAP JUST TELL ME THE PROPERTY NAMES I SHOULD WRITE IN THE BLANK SPACES
iogann1982 [59]

Answer:

1. Communative Property

2. Associative Property

3. Zero Property

Step-by-step explanation:

4 0
2 years ago
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