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dybincka [34]
3 years ago
14

Item 16 Explain why a change from 20 to 40 is a 100% increase, but a change from 40 to 20 is a 50% decrease. Increasing 20 to 40

is the same as increasing 20 by . So, it is a 100% increase. Decreasing 40 to 20
Mathematics
1 answer:
MAXImum [283]3 years ago
7 0

Answer:

Increasing 20 to 40 is the same as increasing 20 by 20 (or itself), so it is a 100% increase. Decreasing 40 to 20 is the same as decreasing 40 by 1/2 or by 20. So it is a 50% increase.

Step-by-step explanation:

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How do you prove if quantities vary directly?
Cerrena [4.2K]

Answer:


Step-by-step explanation:

If quantities vary directly, then one is simply the other multiplied by a fixed number. All sets of two numbers in a direct variation are one number multiplied by a fixed number to get the second number.

Example:

1 gallon of gasoline costs $3.50

2 gallons of gasoline cost $7.00

3 gallons of gasoline cost $10.50

Is the price of gasoline a direct variation based on the number of gallons?

3.5/1 = 3.5

7/2 = 3.5

10.5/3 = 3.5

When you multiply 1 gal, 2 gal, and 3 gal by the constant number 3.5 $/gal, you get the price. Since the multiplication is always by the same number, it is a direct variation.


8 0
3 years ago
Evaluate 6x - 3, when x = 2 14
Rudiy27

Answer:

6x214=1284

1284-3 is 1281

Step-by-step explanation:

7 0
3 years ago
Please help!!!<br>I really confused ​
Viktor [21]

Answer:

91in in feet 7.5ft

Step-by-step explanation:

5 0
3 years ago
Triangle UVW has a perimeter of 11.5 units. Solve for y.
vodomira [7]

Answer:

y = 3.2 units

Step-by-step explanation:

Find the missing angle measure x. Use the fact that all interior angle measures in a triangle add up to 180 degrees.

  • 55 + 50 + x = 180
  • 105 + x = 180
  • x = 75

We can use the Law of Cosines to determine the missing side length y.

  • a² = b² + c² - 2bc · cos(A)

Let's set UW (y) as a, WV as b, and UV as c. Therefore, ∠V must be A, ∠U must be B, and ∠W must be C.

Use the Law of Cosines to solve for a (side length y).

  • a² = b² + c² - 2bc · cos(A)
  • a² = (4)² + (3.5)² - 2(4)(3.5) · cos(50)
  • a² = 28.25 - 28cos(50)
  • a² =  28.25 - 17.99805307
  • a² = 10.25194693
  • a = 3.20186616366    

Side length y is equal to 3.2 units.

8 0
3 years ago
twenty-eight girls and 35 boys signed up for the team challenge. Each team need to have an equal number of girl and boy. What i
Alenkinab [10]
7 teams. The highest common factor between 28 and 35 is 7, thus the greatest number of teams possible with equal numbers of both genders will be 7.
3 0
3 years ago
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