Draw a figure with given perimeter 10 units

Find the value of the cosine for angle a

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.