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Questions in Grade Middle-school

[Open]Explain the difference between a natural system and a technological system.

[Open]How do floods in Mesopotamia deposit silt, and how does this process make the soil fertile?

[Open]Latisha needs 60 square feet of cloth. She has a rectangular piece of cloth that measures 3 feet by 9 feet, and a square piece that measures 5 feet on a side. Does she have enough cloth? If not, how much more does she need?

[Open]How much will the taxi driver earn if he takes one passenger 4.8 miles and another passenger 7.3 miles? Explain your process.

[Open]Solve for \( x \): \[ -3(x-1) + 8(x-3) = 6x + 7 - 5x \]

[Open]Define a variable, write an equation, and solve to find the number. Nine fewer than half a number is five more than four times the number.

[Open]A car with a mass of 1000 kg is traveling at a constant speed of [tex]10 \, \text{m/s}[/tex]. Neglecting any friction, how much force will the engine have to supply to maintain this speed?

[Open]What is the solution for this equation? \[ \frac{X}{2} - 7 = 9 \]

[Open]A 2-kg book is pushed along a table with a force of 4 N. Find the frictional force on the book if the book's acceleration is 1.5 m/s\(^2\). Explain how to find the frictional force.

[Open]Write the fraction \(\frac{375}{12,500}\) as a decimal.