the values of x and y are directly proportional, and y=4 when x=5. what is the value of y when x=20?
回答 (4)
2016-07-13 2:08 am
y ∝ x
Then, y = kx
where k is a non-zero constant.
When x = 5, y = 4 :
4 = k(5)
k = 4/5
Then, y = (4/5)x
When x = 20 :
y = (4/5) * 20
y = 16
Then, y = kx
where k is a non-zero constant.
When x = 5, y = 4 :
4 = k(5)
k = 4/5
Then, y = (4/5)x
When x = 20 :
y = (4/5) * 20
y = 16
2016-07-13 2:00 am
y=4x/5
y=16
y=16
2016-07-13 2:11 am
just tell your teacher to fck off what are you einstein?
2016-07-13 1:59 am
16
收錄日期: 2021-04-18 15:14:00
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