Question

Svetlana's hair is 444 centimeters long. Her hair grows 1.51.51, point, 5 centimeters per month. Svetlana wants her hair to grow so that it is at least 777 centimeters long. Write an inequality to determine the number of months, mmm, it will take Svetlana's hair to grow so it is at least 777 centimeters long.

Answer 1

For this item, I assume that Svetlana's hair is 4 cm long and she wanted it to be at least 7 cm long. 
We let x be the number of months it will take for her hair to be 7 cm long. The sum of the product of x and the rate and the initial length should be at least 7. Mathematically,
                                    1.51x + 4 ≤ 7