Deshaun's test score average increased by 8 points this semester. Write a signed number to represent this change in average. Ali lost 75 dollars from his pocket. Write a signed number to represent this change.

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Tell whether the two rates form a proportion