Lesson
Proportions
9th - 12th grade
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Mathematics
3 hours ago by
mgrios_27884
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  • Slide 1
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    Proportions

    Text
  • Slide 2
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    Proportions

    • A proportion is an equation stating that two ratios (fractions) are equal.

    • If a proportion contains a variable, use cross multiplication and single-step algebra to find the missing value.

  • Slide 3
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  • Question 4
    120 seconds
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    Q.

    Solve for x.
     25=x65\frac{2}{5}=\frac{x}{65}  

    answer choices

    x = 16

    x =  126\frac{1}{26}  

    x = 28

    x = 26

  • Question 5
    120 seconds
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    Q.

    Solve the proportion:

     27=c28\frac{2}{7}=\frac{c}{28}  

    answer choices

    4

    14

    8

    10

  • Question 6
    120 seconds
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    Q.

    Solve for the variable k.

     k6=1518\frac{k}{6}=\frac{15}{18}  

    answer choices

    k = 5

    k = 60

    k =  103\frac{10}{3}  

    k = 90

  • Question 7
    120 seconds
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    Q.

    Solve the proportion:

     8x=1230\frac{8}{x}=\frac{12}{30}  

    answer choices

    x = 15

    x =  111\frac{1}{11}  

    x = 11

    x = 20

  • Slide 8
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  • Question 9
    180 seconds
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    Q.

    Solve the proportion.
     a−65=712\frac{a-6}{5}=\frac{7}{12}  

    answer choices

     2912\frac{29}{12}  

     10712\frac{107}{12}  

     4112\frac{41}{12}  

    13

  • Question 10
    180 seconds
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    Q.

    Solve for x.

     x+34=78\frac{x+3}{4}=\frac{7}{8}  


    answer choices

     12\frac{1}{2}  

    11

     258\frac{25}{8}  

     534\frac{53}{4}  

  • Question 11
    180 seconds
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    Q.

    Solve the proportion:

     89=w−26\frac{8}{9}=\frac{w-2}{6}  

    answer choices

     103\frac{10}{3}  

     469\frac{46}{9}  

     509\frac{50}{9}  

     223\frac{22}{3}  

  • Question 12
    180 seconds
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    Q.

    Solve the equation for x:

     40x+1=156\frac{40}{x+1}=\frac{15}{6}  


    answer choices

    17

    15

    16

    14

  • Slide 13
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  • Slide 14
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  • Question 15
    300 seconds
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    Q.

    Solve for x.

     x−57=x−811\frac{x-5}{7}=\frac{x-8}{11}  


    answer choices

     x = −14x\ =\ -\frac{1}{4}   

     x = −34x\ =\ -\frac{3}{4}  

     x = 13x\ =\ \frac{1}{3}  

     x = 34x\ =\ \frac{3}{4}  

  • Question 16
    300 seconds
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    Q.

    Solve the proportion:



     8b+10=42b−7\frac{8}{b+10}=\frac{4}{2b-7}  

    answer choices

    b = 8

    b =  43\frac{4}{3}  

    b =  1712\frac{17}{12}  

    b =  18\frac{1}{8}  

  • Question 17
    300 seconds
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    Q.

    Solve for k:

     k+510=k−129\frac{k+5}{10}=\frac{k-12}{9}  

    answer choices

    165

     117\frac{1}{17}  

    17

     1165\frac{1}{165}  

  • Question 18
    300 seconds
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    Q.

    Solve the proportion:

     8x−10=4x+9\frac{8}{x-10}=\frac{4}{x+9}  

    answer choices

    -9

    9

    -28

    4

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