Mathematics: Find the missing proportion: 3 : 9 = 2 : _ 57 : _ = 19 : 38 7 : _ = 2 : 3 15 : 2 = _ : 8 0.3 : 4 = 9 : _

Find the missing proportion: 3 : 9 = 2 : _ 57 :

Ответ:

AnActualTrashcan

07.02.2022

Mathematics

Step-by-step explanation:

When solving proportions like these, you can set them up using fractions

#1:

$\frac{3}{9} = \frac{2}{x}\\\frac{1}{3} = \frac{2}{x}\\cross \: multiply\\x = 6\\3:9 = 2:6$

#2:

$\frac{57}{x} = \frac{19}{38}\\\frac{57}{x} = \frac{1}{2} \\x = 114\\57 : 114 = 19 : 38$

#3:

$\frac{7}{x} = \frac{2}{3} \\21 = 2x\\x = \frac{21}{2} = 10.5\\7:10.5 = 2:3$

$\frac{15}{2} = \frac{x}{8}\\x = \frac{15*8}{2} = 60\\15:2 = 60:8$

$\frac{0.3}{4} = \frac{9}{x}\\0.3x = 36\\x = \frac{36}{0.3} = 120 \\0.3:4 = 9:120$

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Ответ:

arnold2619

15.05.2023

Mathematics

The total, 7.49, should be the top bar, and the variable, t, should be one of the partial bars. The prices for a certain number of oranges is also incorrect. $0.75 should be multiplied by 4 and $0.50 multiplied by 8.

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Find the missing proportion:
3 : 9 = 2 : _
57 : _ = 19 : 38
7 : _ = 2 : 3
15 : 2 = _ : 8
0.3 : 4 = 9 : _

Ответ:

Ответ:

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