Answer:
see explanation
Step-by-step explanation:
Given that y is inversely proportional to x then the equation relating them is
y =
← k is the constant of proportionality
To find k use the condition that y = 7, x = 9
k = yx = 7 × 9 = 63, thus
y =
← equation of proportion
When x = 21, then
y =
= 3
Answer:
Step-by-step explanation:
8 2
16 4
24 6
32 8
40 10
???
Answer:
Step-by-step explanation:
I= PRT ÷ 100
P is principal
R is rate (%)
T is time (years)
I = (25000 × 12 × 5) ÷ 100
= 15000
If it was bought after 10% discount, it means it was bought at 90% of the original price:
90% = $450
1% = $5
100% = $5 x 100
100% = $500
The original price of the Play Station was $500.