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Answer:
see explanation
Step-by-step explanation:
(a)
Given y is directly proportional to x then the equation relating them is
y = kx ← k is the constant of proportion
To find k use the condition when x = 3, y = 18 , then
18 = 3k ( divide both sides by 3 )
6 = k
y = 6x ← equation of proportion
(b)
(i)
when x = 12 , then
y = 6 × 12 = 72
(ii)
when y = 42
42 = 6x ( divide both sides by 6 )
7 = x
Multilpy -2 on both sides of the < sign this will get u 1x < 24 in other words x < 24
Answer:
KL ≈ 1.94
Step-by-step explanation:
Using the cosine ratio in the right triangle
cos48° = 
= 
= 
( multiply both sides by KL )
KL × cos48° = 1.3 ( divide both sides by cos48° )
KL = 
≈ 1.94 ( to the nearest hundredth )
