Use a number line to multiply a 2 digit number by 20

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

Hardest math question of all time can you solve the equation. check for extraneous solutions.9∣9-8x∣ = 2x+3

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?