A cell phone company charges a monthly fee of $40 for the first 1200 text messages and 20 cents for each additional text message. MiriamÂs bill for text messages for the month of June is $57.80. How many text messages did she send that month?

What aspects of lines have to be diffrent

Suppose the radius of a circle is 16. what issuppose the radius of a circle is 16. what is its circumference its circumference

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?