Which expression is equivalent to 15+80, 5(3+16) or 15(1 + 4) or 3(5+20) or 4(4+20)

The weight of an object in a particular scale is 175.2 lbs. the measured weight may vary from the actual weight by at most 0.1 lbs. what is the range of actual weights of the object

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

If f(x) = 4x – 3 and g(x) = 8x + 2, find each function value a.f[g(3)] b.g[f(5)] c.g{f[g(-4)]}