The monthly cost (in dollars) of a long-distance phone plan is a linear function of the total calling time (in minutes). The monthly cost for 47 minutes of calls is $14.93 and the monthly cost for 90 minutes is $20.52. What is the monthly cost for 49 minutes of calls?

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels