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3*cos(3x)

First law: Unless acted upon by a force, a object either remains at rest or moves at a constant speed.Second Law: Force=Mass*AccelerationThird Law: For every action there is an equal and opposite reaction...

First have a look at the coefficients of each variable. You're trying to spot if the coefficient of one variable is a multiple of the coefficient of the other in the second equation. If so, you can multi...

Imposition of a unit tax on goods causes supply to decrease. The supply curve moves upwards by the value of the unit tax. This changes its intersection with the demand curve to a higher price and lower qu...

Y = x + 3Y = x^2 + 3x x + 3 = x^2 + 3x3 = x^2 + 2xx^2 + 2x - 3 = 0(x+3)(x-1)=0x=-3 x+1