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Recent Questions

In **Mathematics** / **High School** | 2013-12-09

[Done] If [tex]\arctan\left(\frac{3}{5}\right) = K[/tex], find [tex]\tan(K)[/tex].

In **History** / **High School** | 2013-12-09

[Done] What was an effect of nationalism in Europe in the early 1900s?

In **Mathematics** / **High School** | 2013-12-09

[Done] Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. Find all solutions whenever they exist. \[ x + 3y = 9 \] \[ 3x - y = 7 \]

In **Mathematics** / **High School** | 2013-12-09

[Done] A dealer sells a certain type of chair and a table for $40. He also sells the same sort of table and a desk for $83, or a chair and a desk for $77. Find the price of a chair, a table, and a desk.

In **History** / **Middle School** | 2013-12-08

[Done] What did the Egyptians call the area that we now call Sudan?

In **Mathematics** / **High School** | 2013-12-08

[Done] Add and simplify: \(\frac{9}{16} + \frac{1}{2} = ?\)

In **Chemistry** / **Middle School** | 2013-12-08

[Done] Why are some examples of a chemical reaction not actually foolproof evidence of a chemical reaction? Provide two examples to support the statement that commonly known signs of chemical reactions are not always foolproof evidence of a chemical reaction.

In **Mathematics** / **High School** | 2013-12-08

[Done] Simplify the expression: \((−2x^0y^3)(4x^2y^4) + (2y^5)(3xy)^2\)

In **History** / **Middle School** | 2013-12-08

[Done] Who was the first President of the United States of America?

In **Mathematics** / **Middle School** | 2013-12-08

[Done] Alex built a snowman using three snowballs: one small, one medium, and one large, with diameters in the ratio 2:3:5. Assuming the snowballs are perfectly spherical and stacked vertically with adjacent snowballs sharing a single point of tangency, if the diameter of the medium snowball is 18 inches, what is the maximum height, in feet, of the snowman Alex built using the three snowballs?