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Veseljchak [2.6K]
3 years ago
11

10x -15x + 5= -45 + 20

Mathematics
1 answer:
denpristay [2]3 years ago
4 0

Answer:

x=6

Step-by-step explanation:

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Just plot the points on the graph.
2. You know since the graph is a straight line, the ratios are proportional and therefore equivalent
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What is the measure of angle x, help
Sergeeva-Olga [200]
Y = 180 - 51 -56 = 73

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4 0
3 years ago
Read 2 more answers
What is the constant of proportionality in the table below?
kenny6666 [7]

Answer:  \dfrac{2}{5}

Step-by-step explanation:

The constant of proportionality 'k' between two variables ( one independent and one dependent ) is given by :-

k=\dfrac{\text{Value of dependent variable}}{\text{Value of independent variable}}

In the given table, independent variable = Days

Dependent variable = Total Miles

From first row,  Days = 3

Total Miles = 1\dfrac{1}{5}=\dfrac{6}{5}

Then, the constant of proportionality in the table

k=\dfrac{\dfrac{6}{5}}{3}=\dfrac{6}{5\times3}=\dfrac{2}{5}

Hence, the constant of proportionality in the table is \dfrac{2}{5} .

3 0
3 years ago
A scuba diver is 30 feet below the surface of the water 10 seconds after he entered the water and 100 feet below the surface aft
den301095 [7]

Answer:

2.3 feet/ second

Step-by-step explanation:

To find the rate of change, we will have to find the difference in his distance travelled and divide it by the time taken to move that distance.

This is given by rate of change = (change in position)/ change in time

From the question, his position changed from 30 ft to 100 ft thus the distance he travelled is = 100ft - 30 ft = 70 ft.

Time taken to travel this distance = 40 seconds - 10 seconds = 30 seconds

Diver's rate of travel = 70 ft / 30 seconds = 2.33333ft/second.

Rounding off the answer to the nearest tenth, we have 2.3 ft/second

5 0
3 years ago
The following data are the distances between a sample of 20 retail stores and a large distribution center. The distances are in
sesenic [268]

Answer:

Variance = 1,227.27

Standard deviation = 35.03

Step-by-step explanation:

To calculate these, we use the following formulas:

Mean = (sum of the values) / n

Variance = ((Σ(x - mean)^2) / (n - 1)

Standard deviation = Variance^0.5

Where;

n = number of values = 20

x = each value

Therefore, we have:

Sum of the values = 29 + 32 + 36 + 40 + 58 + 67 + 68 + 69 + 76 + 86 + 87 + 95 + 96 + 96 + 99 + 106 + 112 + 127 + 145 + 150 = 1,674

Mean = 1,674 / 20 = 83.70

Variance = ((29-83.70)^2 + (32-83.70)^2 + (36-83.70)^2 + (40-83.70)^2 + (58-83.70)^2 + (67-83.70)^2 + (68-83.70)^2 + (69-83.70)^2 + (76-83.70)^2 + (86-83.70)^2 + (87-83.70)^2 + (95-83.70)^2 + (96-83.70)^2 + (96-83.70)^2 + (99-83.70)^2 + (106-83.70)^2 + (112-83.70)^2 + (127-83.70)^2 + (145-83.70)^2 + (150-83.70)^2) / (20 - 1) = 23,318.20 / 19 = 1,227.27

Standard deviation = 1,227.27^0.5 = 35.03

5 0
2 years ago
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