y varies directly with x if y=15 when x=-18 find y when x=1.6

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14-11-2017
Mathematics

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y varies directly with x if y=15 when x=-18 find y when x=1.6

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pleasehelp220 pleasehelp220 · Answer 1 · 2017-11-14T18:45:23+01:00

pleasehelp220 pleasehelp220

14-11-2017

The way I answered this question is by putting it in a equal equation. If y and x are directly related then you can solve it by doing the following:

y 15 = y
x 18 = 1.6

15* 1.6 = 18*y

24 = 18y
18 18

1.333333333 = y
1.3 = y

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Ritmeks Ritmeks · Answer 2 · 2021-11-19T11:30:46+01:00

Ritmeks Ritmeks

19-11-2021

y= -1.33

The calculation can be done as follows

y= kx

k= y/x

= 15/-18

= - 0.833

lets solve for y

y= -0.833 × 1.6

y= -1.33

Hence the value of y is - 1.33

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