Isabella changes 700 euros to pounds sterling for her trip to England. The exchange rate is 1 euro = £0.72. How many pounds will she get

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)

Two farmers pay a total rent of $140 for a pasture. the first farmer placed $4 oxen in the pasture, and the second farmer placed $30 sheep in the pasture. the farmers split the rent based on the proportion of the pasture eaten by their own animals that month. how much should the first farmer pay, if 1 ox eats as much as 10 sheep in a month?