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Questions in Grade Middle-school

[Open]How do you convert units within a measurement system?

[Open]What cities are in the region where the most colonists live?

[Open]A type of bacteria moves at a speed of [tex]8 \times 10^{-7}[/tex] meters per second. How far does this bacteria move in [tex]5.45 \times 10^{9}[/tex] seconds? Write your answer in micrometers, using scientific notation. Explain fully how you got your answer.

[Open]Three times a number is 42. What is the number?

[Open]Write an expression for the calculation: Subtract \(\frac{10}{\frac{1}{5}}\) from \(\frac{20}{\frac{1}{2}}\).

[Open]What are the common factors of 15, 33, and 45?

[Open]Why are few large invertebrates found living on land?

[Open]Calculate the sum of [tex]\frac{5}{8}[/tex] and [tex]\frac{11}{12}[/tex].

[Open]Calculate: negative four ninths minus two fifteenths.

[Open]How do you solve the inequality step by step? \[ 2x - 4 \geq 6(x - 1) \]