A triangle has an area of 3x^4 and length of 3x^2+5 which of the following expresses the width of the rectangle? 1. (x+3)^2
2.(x-3)(x+3)
3.(x-3)^2
4.(x^2+9)

Rai compares two cable plans from different companies. which equation gives the correct value of mm, the number of months for which plans a and b cost the same?

This is different from the first one can someone me

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?