Haley had 7 pens. All of the pens are either blue or black, And there are 3 more blue pens than black pens. How many black pens does haley have?

Jonathan worked at McDonald's 20 hours per week and earned 192 $ use the equation 20h = 195 to find Johnathan hourly wage ...

Are the fractions 5/6, 5/7, 5/8, and 5/9 and arranged in order from greatest to least? Explain.

A quadratic equation is shown below: 3x^2 - 15x + 20 = 0 Part A: Describe the solution (s) to the equation by just determining the radicand. Show your work. Part B: Solve 3x^2 + 5x - 8 = 0 by using an appropriate method.

If x+y=10 and x-y=4 then x2=?

U={a, b, c, d, e, f, g, h} A={c, f, h} B={a, f, h} C={a, b, d, e, g} Find set (AnB) u (AnC)

Suppose that textbook weights are normally distributed. You measure 28 textbooks' weights, and find they have a mean weight of 76 ounces. Assume the population standard deviation is 12.3 ounces.

ABC Bookstore rents a storage space that is 75 ft x 50 ft and 15 ft high. It is charged $2.50 per square foot. How much does ABC Bookstore spend on storage space? O A. $140,625 O B. $9375 O C. $2500 O D. $3750

31/9 as a mixed number

Find 4x when 3x equals 3

Solve 64x3 - 1 = 0.