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3 years ago

Decide which problems can be solved by using proportional reasoning. Select all that apply

Mathematics

2 answers:

Nookie1986 [14]3 years ago

8 0

Answer:

Step-by-step explanation:

4 doz for 7.25 = 12 doz for x

set up a proportion

4 12

------ = ------- cross multiply

7.25 x

4x = (7.25)(12)

4x = 87

x = 87/4

x = 21.75 <====

=========================

so we have 0.49 for the first oz.....and 0.22 for each additional oz....and there is 4 additional oz's because 5 - 1 = 4....so thats 0.49 + 4(0.22) = 0.49 + 0.88 = $ 1.37 for the cost of a 5 oz letter. <===

34kurt3 years ago

6 0

Answer:

Step-by-step explanation:

4 doz for 7.25 = 12 doz for x

set up a proportion

4 12

------ = ------- cross multiply

7.25 x

4x = (7.25)(12)

4x = 87

x = 87/4

x = 21.75

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nordsb [41]

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Now, we can calculate the coefficient of variation:

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$CV_s=\dfrac{s_s}{M_s}=\dfrac{16.9}{43.7}=0.387$

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dezoksy [38]

Answer:

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