Out of 150 students surveyed in a school, 15 of them didn't speak neither French nor English. 85 of them spoke english and 96 of them spoke french. How many students spoke both languages?

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.

The table shows the webster family’s monthly expenses for the first three months of the year. they are $2,687.44, $2,613.09, and $2,808.64. what is the average monthly expenditure for all expenses?

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years