3.2x^4-1.5x^2=2.1 find the real solution(s) of the equation.( round your answer to three decimal points.)

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?

How many solutions does the nonlinear system of equations graphed below have? a. one b. zero c. four d. two

Which of the following circles have their centers on the x-axis? check all that apply.