please help... On a market day , Aunt Mansah bought 100 oranges at 4 for 20p. On reaching home, she gave some to her husband and then sold the remaining at 5 for 40p. If she made a profit of £2.60, find the number of oranges given to her husband​

The temperature of a chemical solution is originally 21 ? c . a chemist heats the solution at a constant rate, and the temperature of the solution 75 ? c after 1212 12 minutes of heating. the temperature, tt t , of the solution in ? c is a function of x , the heating time in minutes. write the function's formula.