Whats a equivalent expression to (3x^2+3)+(-2x^2+7)

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?

Use the distributive law to multiply. 3(4x + 5y + 6)

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths