What is the value of x, if the perimeter of the rectangle is 18?

This is the problem ;

Enter the number of complex zeros for the polynomial function in the box. f(x) = x+ + 5x² +6

30 pts, will mark brainliestwhat is the period of the sinusoidal function? (picture 1)what is the minimum of the sinusoidal function? (picture2)what is the maximum of the sinusoidal function? (picture 3)

Solve the equation for x.3(6x - 1) = 12 i've tried doing the math and i can't find out what i'm doing wrong