If x 3 varies directly as y and x 3 when y 12 w... - WAEC Mathematics 2002 Question
If (x + 3) varies directly as y and x = 3 when y = 12, what is the value of x when y = 8?
A
1
B
\(\frac{1}{2}\)
C
\(-\frac{}{}\)
D
-1
correct option: a
((x+3) \propto y<br />
∴x + 3 = ky\hspace{1mm}when\hspace{1mm}x = 3, y = 12<br />
3+3 = 12k<br />
∴ k = \frac{1}{2}<br />
\Longrightarrow x + 3 = \frac{1}{2}y) to find x when y = 8
(x + 3 = \frac{1}{2}\times 8<br />
x=4-3<br />
x = 1)
Please share this, thanks:
#WAEC #WAEC
Add your answer
No responses