Jada has coins that total $9. This is 75% of the value of Miguel's coins. What is the value of Miguel's coins?

Autility company burns coal to generate electricity. the cost c(p), (in dollars) of removing p percent of the some stack pollutants is given by c(p)= 85000p/100-p a) find the cost to remove 30% of the pollutant b) find where the function is undefined

If square root x = -7, then x= -49 true or false

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?