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kipiarov [429]
3 years ago
8

Which situation best represents a proportional relationship?

Mathematics
1 answer:
Strike441 [17]3 years ago
7 0
For 2 variable to share a proportional relationship it should follow the equation;
y = mx 
where y and x are the 2 variables and m is a constant value 
directly proportional means when one variable increases or decreases the other variable too increases or decreases by the same amount.
a) 
2 bracelets sold for $3 
1 bracelet costs - 3/2
therefore 3 bracelets would cost 3/2 * 3 = $4.5
but the cost of 3 bracelets in this case is $6 therefore this is not a proportional relationship 

b) 
time taken for 4 miles - 20 minutes 
time taken for 1 mile - 20/4 
Therefore 6 miles time taken = 20/4 * 6 = 30 minutes 
but it has taken only 24 minutes to run 6 miles therefore this is not a proportional relationship 

c)
number of glasses in 9 cases - 27
glasses in 1 case - 27/9
therefore glasses in 27 cases - 27/9 * 27 = 81 glasses
in the given scenario , 81 glasses were packed in 27 cases therefore this is a proportional relationship

d)
number of pencils in 2 boxes - 8
number of pencils in 1 box  - 8/2
number of pencils in 8 boxes - 8/2 * 8 = 32 
however in this case only 16 pencils in 8 boxes so this too is not a proportional relationship 

correct answer with a proportional relationship is C

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Step-by-step explanation:

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X/9 times 15-47=28<br> help pls
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Answer:

x=45

Step-by-step explanation:

Then,

x/5(15)-47=28

Step 1: Simplify the equation on both sides

x/9(15)-47=28

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Step 2: Add 47 to both sides

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2 years ago
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Answer:

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Step-by-step explanation:

<em>Two angles are complementary if the sum of their measures is 90°</em>

Let us use this rule to solve our question

∵ The angle of measure (3x)° and the angle of measure (5x + 2)°

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→ That means their sum equals 90°

∴ 3x + 5x + 2 = 90

→ Add the like terms in the left side

∵ (3x + 5x) + 2 = 90

∴ 8x + 2 = 90

→ Subtract 2 from both sides to move 2 from the left side to the right side

∵ 8x + 2 - 2 = 90 - 2

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Step-by-step explanation:

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