The expenditure on roads, schools and water supply are in the ratio 7:15:2. If the expenditure on roads is GH¢2,800.00. Find the expenditure on school, water supply and total expenditure

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .