How many terms does 9ab2 - 10ab + 7a2b2 - 66 have?

The scatterplot below shows the number of hours that students read weekly and the number of hours that they spend on chores weekly. which statement about the scatterplot is true?

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= ?

What is the approximate value of  x  in the equation below.–3.396–0.7080.3040.955