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Questions in Grade Middle-school

[Answered] Factor the expression \( x^3 + 3x^2 - x - 3 \) by grouping.

[Answered] 36 is what percent less than 60?

[Answered] McDonald's has sold more than a billion hamburgers. If it were possible to eat a hamburger every minute of every day (day and night) without stopping, how many years would it take to eat a billion hamburgers?

[Answered] Your model locomotive is 18 inches long. It is an exact model of a locomotive that is 72 feet long. How many times wider is a window on the locomotive than a window on the model?

[Answered] How many hours are there in a million days?

[Answered] Solve the equation: \[ 10u + 7 = 8(2u - 4) - 9 \]

[Answered] Simplify the expression: \[ \frac{9}{10} \div \left(\frac{1}{10} + \frac{2}{5}\right) \]

[Answered] What do you call two ratios that have the same value?

[Answered] What do you call two ratios that have the same value?

[Answered] If light travels 671,000,000 miles per hour, how many miles will it travel in one minute?