kaylatunell123
18.11.2019 •
Mathematics
The variables x and y vary inversely with a constant variation of 7. use the variation formula, k=xy, to find why when x=9
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Ответ:
1.Make y the subject
k = xy
k/x = xy/x
y = k/x
2.Substitute
y = k/x
y = 7/9
y = 0.777
y = 0.8 (Answer)
To confirm
k = xy
k = 9 × 0.8
k = 7.2
k = 7 (constant)
Hope it helps☺
Ответ:
30) x= 4
32) x=30
33) x=22
Step-by-step explanation:
All step by step explainations are in pic below