How many combinations of three books can be selected from 40 books?

The teacher separated her class of twenty-eight students into two groups. One group has 4 more than twice as many students as the other group. How many students are in each group?

Find a marginal Profit function if cost and revenue are given by c (x) = 240+0.3x and r (x) = 8x-0.06x^2

a bakery sold 1/2 its bread in the morning. that afternoon it sold 21 mpre loaves and had 6 left. how many loaves did the bakery habe at the beginning of the day?

Identify which of the following are rational numbers. A. - 5 B. √12 C. 4 3 ⁄ D. 0.523523 ... E. 4.1389467 ... F. √25 16 ⁄ G. 27 H. 9. 7

Which figures can have circular cross sections when cut by a plane? Select all correct answer choices. If there is only one correct answer choice, select "only" and the correct answer choice.

At the beginning of the first day, a company has 64 shipping crates on backorder. By the end of each day, customers order 18 more shipping crates.

2/3 of a number is 12

The table represents a function. A 2-column table with 4 rows. The first column is labeled x with entries negative 4, negative 1, 3, 5. The second column is labeled f of x with entries negative 2, 5, 4, negative 8. What is f (5) ?

What is the rule for divisibility by 2?

if a certain number is added to 24, the result is the same as if the number were multiplied by 3. what is the number?