If x= 345 and y = 23 then what is the value of z times x and y

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares

Find two numbers if their sum is 91 and the ratio is 6: 7?

Can someone me and explain..will award brainlest!