If it takes 0.3 seconds for a star-nosed mole to eat 1 insect, how many insects can it eat in 1 minute?

How do you use the elimination method for this question? explain, because i really want to understand!

Atorch and a battery cost 2.50 altogether.the torch costs 1.50 more than the battery.what fraction of the total price is the torch? give your answer in its simplest form.

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?