2 upon 7 x + 3 upon 5 y into x square +y2

15 oranges weigh 3.75 kilograms (kg). if each orange weighs approximately the same, approximately how much does each orange weigh?

Adie is rolled, what is the probability of getting an even number or a 3? write the solution too

In chemistry,n molecules of an ideal gas have pressure, volume, and tempersture that stand inthe following relation, where r is constant. solve the equation for n,the number of molecules. pv=nrt