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Will1119
10.11.2020 •
Mathematics
The value of y varies directly with the value of x. Which function represents the relationship between x and y if y=7/3 when x=21?
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Ответ:
y = 1/9x
Step-by-step explanation:
Since it's a direct proportion, the formula to use will be:
y = kx
where,
y = 7/3
x = 21
k = unknown
y = kx
7/3 = 21k
k = 7/3 ÷ 21
k = 7/3 × 1/21
k = 1/9
The function will then be:
y = kx
y = 1/9x
Ответ:
6.58-8.36x=3.98x-27.33
Collecting like terms
6.58+27.33=3.98x+8.36x
33.91=12.34x
33.91/12.34=12.34/12.34
x=2.75