Solve each inequality show work the absolute value of b is greater than or equal to 10

So we have the inequality . To solve it we are going to use the proper tie of inequalities that says that if we have a greater than absolute value inequality, its solution will always have two parts. In other words, given  its solution will have two parts:  and . Lets apply this to our problem:

or 

We can conclude that the solution set of our inequality is (-∞,-10]U[10,∞)

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post