What's -3a(5a-7) ? i can't figure it out .

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.

Hurry can a triangle can be constructed with angles measuring 115°,55°, and 20°? yes or no

Maria heard on the radio that the high temperature that day would be to determine the temperature in degrees celsius, she used the formula , where c is the temperature in degrees celsius and f is the temperature in degrees fahrenheit.