The sum of n terms of an ap whose first term is 6 and common difference is 40 is equal to the sum of 2n terms of another ap whose first term is 40 and common difference is 6. find n?

The cash price of a television is $580.the hire-purchase price of the television is $865.the hire-purchase price is an initial deposit of n% of the cash price and 6 equal monthly payments of $120.find the value of n.

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2