Maths
posted by Alexander .
A car showroom had 10y cars, 20y motorcycles and 18 vans. In a particular month, 4y cars , 3y motorcycles and 15 vans were sold.
a.) Find the total number of wheels on the remaining vehicles in terms of x.
b.) If y=21, how many wheels were there?
An indoor stadium has 25 460 seats. 25% of them are Category A seats. For a concert, Mr Ramly requires 40% of the seats to be Catergory A seats. Find the increase in the number if Category A seats.

a)
(10y4y)*4 + (20y3y)*2 + (1815)*4
= 24y+34y+12
= 58y + 12 wheels remaining
b) 58*21+12 = 1230
an extra 15% of seating is needed.
15% of 25460 = 3819