An equilateral triangle has a side length represented by the expression 4x+3. if the perimeter is 189 units, what value does x represent?

Kelli swam upstream for some distance in a hour.she then swam downstream the same river for the same distance in only 6 minutes.if the river flows at 5km/hr, how fast can kelli swim in still water?

The function h (t) = -16t squared + 28t + 500 represents the height of a rock t seconds after it's propelled by a slingshot what does h (3.2) represent?

16x^2-16x=5 solve the equation by completing the square