NEED HELP ASAP Find the error and explain why it is wrong: Jon found the solution to the systems of linear and quadratic equations. what did he do wrong?

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.

Annabelle's homework is 75% it took her three hours how long should she estimate it will take her to complete her homework.

Azul has 4 green picks and no orange picks. you add orange picks so that there are 2 orange picks for every 1 green pick. how many picks are there now.