Simplify the following expression: \( -3(2x - 4) + 5x - 8 \)
Solve for y in the equation: \( \frac{2}{3}y - 5 = -11 \)
Evaluate the expression for \( a = -2 \) and \( b = 5: a^3 + 2b - |a - b| \)
Find the value of x that satisfies: \( 0.4x - 1.2 = 0.2x + 0.8 \)
A rectangular prism has a volume of \( 120\text{ cm}^3 \). If its length is \( 8\text{ cm} \) and its width is \( 3\text{ cm} \), what is its total surface area?
Calculate the following: \( \left(-\frac{3}{4}\right) \div \left(\frac{1}{2} - \frac{7}{8}\right) \)
A number n is decreased by \( 20\% \), and then the result is increased by \( 20\%. \) If the final value is 96, what was the original number n?
What is the result of \( (2 \times 10^3) \times (4.5 \times 10^5) \) expressed in scientific notation?
If the mean of five numbers is −2, and four of the numbers are −5,3,0, and −8, what is the fifth number?
Which of the following coordinates represents a reflection of the point (4, -7) across the y-axis?