Christina collects stamps. she has 47 stamps in all. she has 20 stamps from europe. the number of african stamps is 2 times the number of asian stamps. how many stamps from each of these three continents does she have?

Find the value of the variable and the length of each secant segment.

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

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= ?