Solve Problems Using Systems of Linear Equations
-Julie and Eric $3 \mathrm { mph }$

question 100

Multiple Choice

Solve Problems Using Systems of Linear Equations
-Julie and Eric row their boat (at a constant speed) 27 miles downstream for 3 hours, helped by the current. Rowing at the same rate, the trip back against the current takes 9 hours. Find the rate of the current.

• A) \(3 \mathrm { mph }\)
• B) \(6 \mathrm { mph }\)
• C) \(4 \mathrm { mph }\)
• D) \(2.5 \mathrm { mph }\)

---

Definitions:

Physical Processes

Natural phenomena or sequences of events involving change in the physical properties of matter or energy.

Cation Exchange

A process where cations are exchanged between a solution and a cation exchange material, often soil or resin.

Humus Formation

The process by which dead organic matter decomposes into humus, a dark, organic material that improves soil fertility and structure.

Federal Legislators

Elected officials at the national level who have the authority to make laws, including members of the United States Congress.