Where x is the length of the first piece

so the first piece is 3 inches, the second is 6 inches and the third is 19 inches
Move all the x terms to one side and solve for x. 15x-10x=21-6 : 5x/5=15/5 : x=3
Simple interest= prt
=806.68 (.0525)(1)
=42.35
Balance=investment + interest earned
806.68+42.35=$849.03
Answer:
10/40 or a 1 in 4 chance he will grab a red marble
Step-by-step explanation:
You add up all of the marbles;
10+15+15
40
Now you take the number of red marbles are divide it by 40;
10/40
That is your answer.