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Doss [256]
3 years ago
9

The variables x and y vary directly. Use the values to find the constant of proportionality. Then write an equation that relates

x and y. y=72; x=3
Mathematics
1 answer:
uysha [10]3 years ago
5 0
2y + 4x = 144+ 12= 156
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Write and graph an equation that is perpendicular to the equation x-3y=6 and through point (2,-3)
Korvikt [17]

Answer:

y = mx + b   is slope-intercept form of the linear equation.

y - y1 = m(x - x1)   is point-slope form of the linear equation.

Ax + By = C  (A ≥ 0)   is standard form of the linear equation.

~~~~~~~~~~~

....

              1  

y – 5  =  ——  (x + 1)

              3  

         1             1

y  =  —— x  +  ——  +  5

         3             3  

                   1             16

(1)   y  =  ——  x  +  ——

                  3              3  

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Please solve and show work! Thanks!
notsponge [240]

Answer:

1) x < 1, x > 9

2) 2 < x ≤ 6, -4 ≤ x < 0

Step-by-step explanation:

1) lx - 5l > 4

x - 5 = 4

x = 9

-(x - 5) = 4

x = -4 + 5 = 1

x < 1, x > 9

3) 1 < lx-1l ≤ 5

1 < x-1 ≤ 5

2 < x ≤ 6

1 < -(x-1) ≤ 5

-5 ≤ x-1 < -1

-4 ≤ x < 0

6 0
3 years ago
Read 2 more answers
In the context of correlational research, if there is no relationship between two variables, what is the correlation coefficient
mel-nik [20]

Answer:

The Correlation coefficient is 0

Step-by-step explanation:

3 0
3 years ago
A contractor records the areas, in square feet, of a small sample of houses in a neighborhood to determine data about the neighb
Sedbober [7]

Option c is the correct answer which represents the numerator in the calculation of variance and standard deviation.

<h3>What are the variance and standard deviation?  </h3>

In statistics, variance is a measure of the variation of data from the mean, whereas standard deviation is the measure of the normal distribution of statistical data.

A contractor records the areas, in square feet, of a small sample of houses in a neighborhood to determine data about the neighborhood.

2,400; 1,750; 1,900; 2,500; 2,250; 2,100

we need to find which of the following represents the numerator in the calculation of variance and standard deviation.

(225)^{2} + (–425)^{2}+ (–275)^{2} + (325)^{2} + (75)^{2}+ (–75)^{2} = 423,750

(650)^{2} + (–150)^{2} + (–600)^{2} + (250)^{2} + (150)^{2} + (–300)^{2} = 980,000

(250)^{2} + (–400)^{2} + (–250)^{2} + (350)^{2} + (100)^{2} + (–50)^{2} = 420,000  

92416.60

The variance is 84000

The standard deviation is 290

mean = (2400+1750+1900+2500+2250+2100)/6

mean = 2150

Subtract the data values from the mean to get

2400-2150 = 250

1750-2150 = -400

1900-2150 = -250

2500-2150 = 350

2250-2150 = 100

2100-2150 = -50

The differences are 250, -400, -250, 350, 100, -50

Then you square those values and add up the squares

(250)^2 +  (-400)^2 +  (-250)^2 +  (350)^2 +  (100)^2 +  (-50)^2 = 420,000

Hence, option c is the correct answer which represents the numerator in the calculation of variance and standard deviation.

Learn more about variance;

brainly.com/question/14116780

8 0
1 year ago
What does 2 m 36 cm equal in mm?
marishachu [46]

Answer:12

Step-by-step explanation:

12w

8 0
3 years ago
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