Ana-Alexandra Kimm submitted 20 Apr at 19:12 Here are five cards.
1
5
7
11
One of the cards is removed.
The mean of the numbers on the remaining four cards is 6
Which card was removed?
You must show your working,

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? 8,000 + 24x 8,000 − 24x 8,000 + 2x 8,000 − 2x

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)