Question
Find the value of x when y = 5, if x varies directly as 4y-1 and x = 14 when y = 2.
Answer: Option A
LET Z = 4Y-1
WHEN X = 14, Y = 2, Z = (4*2) – 1 = 7
NOW, X VARIES DIRECTLY AS Z = 4Y-1
WHEN Y = 5, Z = (4*5) – 1 = 19
X 14 7
Y – 19
THEREFORE, X = (14*19)/7 = 38
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LET Z = 4Y-1
WHEN X = 14, Y = 2, Z = (4*2) – 1 = 7
NOW, X VARIES DIRECTLY AS Z = 4Y-1
WHEN Y = 5, Z = (4*5) – 1 = 19
X 14 7
Y – 19
THEREFORE, X = (14*19)/7 = 38
Was this answer helpful ?
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