An aquarium contains dolphins, sharks, and whales. There are twice as many dolphins as whales
and 8 fewer sharks than dolphins and whales com-
bined. If there are w whales, which of the following
represents the number of sharks?
A. 5w
B. 3w - 8
C. 10 +
D. 3w2–8w
E 3V2w - 8

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?

Find the percent cost of the total spent on each equipment $36, fees $158, transportation $59 a. 14%, 62%, 23% b. 15%, 60%, 35% c. 10%, 70%, 20% d. 11%, 62%, 27%

Match the one-to-one functions with the graphs of their inverse functions.