Robert and jerry share the cost of buying a car which costs $930. period robert agrees to pay $100 more than jared. how much does robert pay?

(hurry! ) which expression is equivalent to the following complex fraction?

Ageologist had two rocks on a scale that weighed 4.6 kilograms together.rock a was 0.5 of the total weight.how much did rock a weigh?

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500