A history teacher is writing a test worth 100 points. She uses multiple-choice questions worth six points each and true/false questions with two points each. She wants the test to have three times as many multiple-choice questions as true/false questions. Let M represent the number of multiple-choice questions on a test and let T represent the number of true/false questions which system of equations can be used to find how many of each type of question she should write?

The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle

Determine which postulate or theorem can be used to prove that lmn =nmo

Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.