Need help ASAP please and thank you

For the function, f(x) = -5x 2, find f(-4).

The scale for a map is 20 miles = 1/2 inch. the distance between two towns on the map is 3 3/4 inches. what is the actual distance between these towns? 150 miles 38 miles 75 miles 135 miles

What does x = in this equation x+3+2x=x+5