use fraction bars and the rules of dividing signed numbers to divide.

the quotient is

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

Solve 2x+y=3 x+y=5 in substitution method

Solve the following simultaneous equation by using an algebraic method (either substitution or elimination) 2x + 3y=-4 4x-y=11