Answer:
y = 48
Step-by-step explanation:
given y is directly proportional to x then the equation connecting them is
y = kx ← k is the constant of proportionality
To find k use the condition y = 36 when x = 30
k =
=
= 
y =
x ← equation of proportionality
When x = 40 then
y =
× 40 = 48
51.5 Hectograms + 5100 Grams
51,500 Decigrams = 5100 Grams
They have same mass because they equal each other.
20% of 124.95 is close to $125 so that is equal of 12.50 of 10% so multiply by 2 which is $25.00 so the estimate discount of the jacket will be $25.00