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Answered

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1. Is 2/12 = 5/28 a true proportion?

Step 1. Cross multiply.

2 x 28 = 12 x 56
56 = 672


Step 2. is the proportion true?

-----, because the cross products are not ----------.

The proportion -------- true, because 2/12 and 5/28 ------------ equivalent ratios.

Sagot :

mhanifa

Answer:

  • See below

Step-by-step explanation:

Step 1

  • 2/12 = 5/28
  • 2*28 = 12*5
  • 56 = 60

False equation

Step 2

  • No, because the cross products are not equal.
  • The proportion is not true, because 2/12 and 5/28 are not equivalent ratios.

Solution (1):

We know that:

  • Given proportion: 2:12 = 5:28

Step-by step calculations:

Simplify the LHS:

  • 2:12 = 5:28
  • => 1:6 = 5:28

Remember: (a:b = c:d) = (a x d = b x c)

Use cross multiplication:

  • => 1:6 = 5:28
  • => 28 = 30 (False)

Solution (2):

  • No, because the cross products are not equivalent.
  • The proportion is not true, because 2/12 and 5/28 are not equivalent ratios.

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