Is this correct? If it isn’t what is the correct ?

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

What are the solutions of the system? y = x^2 + 2x +3y = 4x - 2a. (-1, -6) and (-3, -14)b. (-1, 10) and (3, -6)c. no solutiond. (-1, -6) and (3, 10)

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.