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Sladkaya [172]
3 years ago
14

Can you please help me with #39 please!!?? Please explain part b. Please!!!!

Mathematics
1 answer:
zysi [14]3 years ago
4 0
50 students were surveyed and 18 would like to learn spanish.
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Students in a world geography class want to determine the distances between cities in Europe. The map gives all
galina1969 [7]

Using a proportional relationship, we have that:

  • a) The constant of proportionality is of 0.625, hence the equation is: y = 0.625x.
  • b) The distance of two cities that are 5 miles apart is of 8 kilometers.
  • c) When they are 200 kilometers apart, we have that the distance in miles is of y = 0.625(200) = 125.

<h3>What is a proportional relationship?</h3>
  • A <em>proportional relationship</em> is a function in which the <u>output variable is given by the input variable multiplied by a constant of proportionality</u>, that is:.

y = kx

  • In which k is the constant of proportionality.

Item a:

From the graph, when x = 8, y = 5, hence:

y = kx

5 = 8k

k = \frac{5}{8}

k = 0.625

The constant of proportionality is of 0.625, hence the equation is: y = 0.625x.

Item b:

From the graph, when y = 5, x = 8, hence:

  • The distance of two cities that are 5 miles apart is of 8 kilometers.

Item c:

When they are 200 kilometers apart, we have that the distance in miles is of y = 0.625(200) = 125.

You can learn more about proportional relationship at brainly.com/question/13550871

4 0
3 years ago
Find an expression which represents the difference when (-3x + 5y) is subtracted
lubasha [3.4K]

Step-by-step explanation:

-3x+5y-(-6x)+3y

-3x+5y+6x+3y

-3x+6x+5y+3y

3x+2y.

8 0
3 years ago
K &amp; Christian each have a garden of the same size and shape cake grows flowers one and six her of her garden Christian grows
m_a_m_a [10]

Answer:

Christian will grow more flower as she utilizes all her garden area for the flower growth.

Step-by-step explanation:

Flower growth is difficult process as it involves great care by a gardener. Christian also grows flowers in her three garden which are available to her. She has same size flower which she grows in her garden.

5 0
3 years ago
Solve for x. Sqrt. x +3 / x+3 = 1
SashulF [63]

Answer:

x = -3 and  x = -2

Step-by-step explanation:

-3 +3 = 0

-3 + 3 = 1

thus that means 0 + 1 = 1

3 0
3 years ago
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What is y equals negative three fourths plus two equal
Crazy boy [7]
Y = -3/4 + 2

y = 1 1/4


7 0
3 years ago
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