With this word problem
ralph can lay down a floor tile in 5 seconds. bob can lay down a floor tile in 4 seconds. if both boys work together, how many seconds would it take them to install 450 floor tiles.

What is the vertex form of f(x) = x2 + 6x + 3

Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need

Frank owns a $141,000 home, for which he has a 30-year mortgage in the amount of $700 a month. once he has paid off mortgage, how much will he have paid in investment? a. $111,000 b. $109,000 c. $120,000 d. $141,000