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
Answer:
The interest is $35 so it ends up costing her $70
Step-by-step explanation:
Answer:
x=7/5
Step-by-step explanation:
Answer:
yes all are right
Step-by-step explanation:
it means 3 and then "e" means is up of the 3so its 3↖-6
