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Questions in Grade Middle-school

[Terjawab] Is [tex]8x + 9y = 10[/tex] a direct variation?

[Terjawab] Is Alex correct in saying that if he rolls an odd number on the first number cube, it is more likely that he will roll an even number on the second number cube? Explain.

[Terjawab] PLEASE HELP!!! THERE IS A PICTURE ATTACHED Francisco is playing a game with 3 green, 2 yellow, 4 red, and 3 black marbles in a bag. He has calculated the probability of drawing a yellow marble, not replacing it, and then drawing a red marble. Explain the error in his solution.(the picture is Fransisco's work)

[Terjawab] You must roll a total of 9 on two number cubes to win the game. Alex must roll a 6. Who is more likely to win the game on the next turn? Explain.

[Terjawab] Garrett throws a large rock into a waveless pond. The impact of the rock hitting the water causes waves to travel along the pond's surface toward the shore. If Garrett counts the number of waves that reach the shore over a 10-second period, what property of the waves is he measuring?

[Terjawab] What role do bacteria and other tiny organisms play in ensuring that nutrients are always available in ecosystems?

[Terjawab] What were the Crusades?

[Terjawab] Cecilia created 2.5 liters of a chemical mixture for an experiment. Saline solution accounted for 12.5% of the mixture. How many liters of saline solution were in the mixture?

[Terjawab] What is the expanded form of \((3 + x)^2\)?

[Terjawab] What is the LCM (Least Common Multiple) of the following pairs of numbers? 1. 4 and 14 2. 12 and 21 3. 16 and 12 4. 25 and 30 5. 40 and 50 6. 18 and 24