�������, ��������, ���������: ������� � ���� ����� ��� ���� ��� ���� Thus if b is the speed of the boat in still water, and c is the speed of the current, then its total speed is. Downstream speed = b + c. When a boat travels against the current, it travels upstream. In this case, its total speed is. Upstream speed = b ? c. Problem. The speed of a boat in still water is 30 mph. Oct 14, �� The downstream rate will have an overall rate faster than the boat in still water since the flow of the water speeds them up: R = b + w (boat and water rate) Then the upstream rate is the same except the water rate slows down the boat, so: r = b - w. If we substitute those back into our two base equations, we now have. Speed of the steamer in downstream = x +2 Speed of the steamer in upstream = x � 2 So time = Distance / speed Distance = speed x time D = (x +2) 4 D = (x � 2) 5 As the distance between the port is same. 4(x +2) = 5(x -2) 4x + 8 = 5x x = X = 18 Speed of the the steamer in still water = 18 m/h.
Main points:

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How many tickets of each kind were sold? Let x be the number of adult tickets. Let y be the number of children's tickets. Always let x and y answer the question -- and be perfectly clear about what they represent! Now there are two unknowns. Therefore there must be two equations. In general, the number of equations must equal the number of unknowns. How can we get two equations out of the given information? In equation 2 , let us make the coefficients into whole numbers by multiplying both sides of the equation by We call the second equation 2' "2 prime" to show that we obtained it from equation 2.

These simultaneous equations are solved in the usual way. To see the answer, pass your mouse over the colored area. To cover the answer again, click "Refresh" "Reload". Do the problem yourself first! Example 2. How much did she invest at each rate? To change a percent to a decimal, see Skill in Arithmetic, Lesson 3. Again, in equation 2 let us make the coefficients whole numbers by multiplying both sides of the equation by Problem 1. How many of each does she have?

To see the answer, pass your mouse from left to right over the colored area. Let x be the number of quarters. Start a Discussion Post an Article. Skip main navigation Press Enter. Toggle navigation. Date range on this day between these dates. Posted by. Community Home Discussion Expand all Collapse all sort by most recent sort by thread. Requirement tables with upstream or downstream items. Hello, I used these steps: How to add tables to Word templates to create a children table for req This brings up the concept of a Traceability Matrix.

Jama has a nice traceability view Hi Lawrence - Which version of Jama are you using? Hi Nicki - The Word Exports don't allow items of different types in the same table. In order to do Thanks, Shawnna. Posted Reply Reply Privately Options Dropdown.




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