7 x 45 = 7 x 3 x ? What should replace the ? In the number sentence

At $1.32 million, they closed last month percent above what they paid in 2007." how much did they pay in 2007?

Polynomials plz quick 1: subtract and simplify (–y^2 – 4y – 8) – (–4y^2 – 6y + 3)

If the average of x,y and z is 15 what is their sum