One pen costs \(\$\)0.25 and one marker costs \(\$\)0.35. At those prices, what is the total cost of 18 pens and 100 markers?
The average (arithmetic mean) of five numbers is 14. If four of the numbers are 10, 12, 18, and 20, what is the fifth number?
If a car travels at an average speed of 55 miles per hour for the first 2 hours and 65 miles per hour for the next 3 hours, what is the total distance traveled?
Simplify the expression \( \frac{5x}{2x} + \frac{3}{2x} \).
Solve for \( y \): \( 4y - 3(2y + 1) = 5 \).
If \( f(x) = 2x^2 - 3x + 1 \), find \( f(-1) \).
Expand the expression \( (2x - 3)(x + 4) \).
If \( x^2 - 5x + 6 = 0 \), what are the possible values of \( x \)?
What is the area of a trapezoid with bases of lengths 6 cm and 10 cm, and a height of 5 cm?
What is the volume of a cone with a radius of 3 cm and a height of 4 cm? (Use \( \pi \approx 3.14 \))
Find the length of the diagonal of a rectangle with length 8 cm and width 6 cm.
What is the surface area of a sphere with a radius of 5 cm? (Use \( \pi \approx 3.14 \))
A dataset contains the numbers 5, 7, 9, 11, 13, and 15. What is the standard deviation?
A survey of 300 people found that 180 like coffee, 120 like tea, and 90 like both. How many people like only coffee?
What is the range of the dataset \(\{5, 8, 12, 20, 25\}\)?
A company's revenue increased from \( \$\)200,000 in 2019 to \(\$\)250,000 in 2020. What is the percentage increase?