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November 4, 2024

Pre-Algebra

The solution to the problem \sqrt{25\%} + \sqrt{49\%} is 1.2, which is equivalent to 120%.

November 3, 2024

Geometry

To find x, the exterior angle theorem is used, along with the knowledge that a right angle is 90 degrees, to solve for x, which equals 45 degrees.

November 3, 2024

Pre-Algebra

The solution to the equation involving radicals and exponents is x = 77/120.

November 3, 2024

Word-Problem

The water lily takes 47 days to cover half the pond, given that it doubles in size each day and covers the entire pond on day 48.

October 31, 2024

Algebra

The equation 3^(x^2)/9^x = 81 is solved by rewriting the equation with the same base, simplifying the denominator, applying the quotient rule for exponents, equating the exponents, rearranging into a quadratic equation, and finally using the quadratic formula to find the two solutions, x = 1 + √5 and x = 1 - √5.

October 31, 2024

Geometry

The unknown angle in a triangle, formed by two slanted lines and a vertical line, with two given angles of 80 degrees each, is calculated to be 20 degrees using the triangle angle sum property.

October 31, 2024

Algebra

The equation x^2 + 3x + 7 = 6/(x^2 + 3x + 2) is solved by substituting u = x^2 + 3x, resulting in a quadratic equation in u. Factoring the quadratic equation yields two possible values for u, which are then substituted back into the substitution to find the solutions for x using the quadratic formula. One case results in two real solutions, while the other yields no real solutions.

October 30, 2024

Algebra

The solution to the equation \sqrt{7 + \frac{3}{\sqrt{x}}} = 7 - \frac{9}{x} is x = \frac{9}{4}.

October 30, 2024

Algebra

The solution involves finding an expression for X_n, a sum of reciprocals of powers of x, using the formula for a finite geometric series. Then, the expression for x^n is used to simplify the ratio x^n / X_n, ultimately resulting in x^(n+1).

October 30, 2024

Geometry

To find x, supplementary angles 5x and 4x are used, along with the fact that the sum of the interior angles of a quadrilateral is 360 degrees. Solving the equation 9x = 180 yields x = 20.