Gertrude won the jump rope contest four more times than elena. they have won a combined total of 18 jump rope contest. write and solve a system of equations to find the number of contest gertrude won and the number of contest elana won

About 400,000 people visited an art museum in december. what could be the exact number of people who visited the art museum?

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)