There are 18 boys in a class of 39 pupils. How many boys should be in a sample of 15 from the class?

What is the equivalent ratio of _:48 = 30:36

What is the most common factor between 139 and 100

A set of data contains numerical elements between 2 and 14, inclusive. Which of the following measure (s) of central tendency must change if an outlier of 14 is removed from data? range mode median mean (salect all that apply)

Katy bought a motorcycle for n dollars. Years later, she sold it for 0.6n dollars. Which is another way to describe the change in the price of the motorcycle? A. 40% decrease B. 60% decrease C. 6% increase D. 60% increase

A car is traveling at a rate of 90 kilometers per hour. What is the car's rate in kilometers per minute? How many kilometers will the car travel in 20 minutes? Do not round your answers.

Katya is 15 years old, which is 5/6 of her brother's age. How old is her brother?

Complete the square so that the left side of x2 + 8x - 3 = 0 becomes a binomial squared.

The numerators of any rational roots of a polynomial will be factors of the what?

What is 12-9*3*4+3 in three different ways

What is the combined land area of the countries A and B is 154,973 square kilometers. Country A is larger by 573 square kilometers. Determine the land area of each country