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Questions in Grade Middle-school

[Done] A bank contains 27 coins consisting of dimes and quarters. The coins have a total value of $4.95. Find the number of dimes and quarters in the bank.

[Done] Solve this system of equations by substitution: \[ \begin{align*} -2x - y &= -9 \\ 5x - 2y &= 18 \end{align*} \]

[Done] Can anyone help me solve this system of equations by elimination? 1. \(5x + 4y = -30\) 2. \(3x - 9y = -18\)

[Done] Write a conversation between Hitler and Gandhiji consisting of 10 exchanges.

[Done] Given that [tex]6x = 7y[/tex], find the ratio [tex]x:y[/tex].

[Done] Solve for x in the equation: 5x - 3 = 17

[Done] Solve the equation: \[ 3x + 4 = 2x - 7x - 9 \] Thank you!

[Done] Find two ways to determine the number of dimes in $8.70. --- Feel free to add any additional instructions or context that might be needed.

[Done] Can you explain that gravity pulls us to the Earth, and can you calculate weight from masses both on Earth and on other planets?

[Done] What two things affect the gravitational force acting on an object?