Find the difference. (5x 2 - 3x + 7) - (3x 2 + 4x - 5)

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula c= r/1.8 - 273, what is the temperature in celcius corresponding to r degrees rankine.

Find three consecutive numbers such that the sum of one-fourth the first and one-fifth the second is five less than one-seventh the third

Which expression will have the same sum as 3_8 + 1/4?