Select all of the following that are quadratic equations.. x2 - 2x = 4x + 1. x3 - 6x2 + 8 = 0. 5x - 3 = 0. 2x2+ 12x = 0. 5x - 1 = 3x + 8. 9x2 + 6x - 3 = 0

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Emagnitude of the electrical force acting between a +2.4 ×  10–8  c charge and a +1.8 ×  10–6  c charge that are separated by 0.008 m is    n, rounded to the tenths place.

A75-hp (shaft output) motor that has an efficiency of 91.0 percent is worn out and is to be replaced by a high-efficiency motor that has an efficiency of 95.4 percent. the motor operates 4368 hours a year at a load factor of 0.75. taking the cost of electricity to be $0.12/kwh, determine the amount of energy and money saved as a result of installing the high-efficiency motor instead of the standard motor. also, determine the simple payback period if the pu