91Ó°ÊÓ

Find the opposite, or additive inverse. $$ -56 $$

Find the opposite, or additive inverse. $$ -11 $$

Chess Ratings. The formula $$R=r+\frac{400(W-L)}{N}$$ is used to establish a chess player's rating \(R,\) after he or she has played \(N\) games, where \(W\) is the number of wins, \(L\) is the number of losses, and \(r\) is the average rating of the opponents. Ulana's rating is 1305 after winning 5 games and losing 3 games in tournament play. What was the average rating of her opponents? (Assume that there were no draws.)

Use roster notation to write each set. The set of all natural numbers that are multiples of 5

Female Caloric Needs. The number of calories \(K\) needed each day by a moderately active woman who weighs w pounds, is \(h\) inches tall, and is a years old can be estimated by $$K=917+6(w+h-a).$$ Julie is moderately active, weighs \(120 \mathrm{lb},\) and is 23 years old. If Julie needs 1901 calories per day in order to maintain her weight, how tall is she?

Use set-builder notation to write each set. The set of all multiples of 5 between 7 and 79

Write an equivalent expression with negative exponents. $$ (-6)^{4} $$

Solve. $$ 27=9(5 y-2) $$

Which numbers in the list provided are (a) whole numbers? (b) integers? (c) rational numbers? (d) irrational numbers? (e) real numbers?. $$ -17,-0.01,0, \frac{5}{4}, 8, \sqrt{77} $$

Subtract. $$ 4-10 $$