Which of the following terms appear in the expansion of (x + y)^10? the letter a in each term represents a real constant.
a. ax^3y^7
b. ax^5y^5
c. ax^5
d. ay^5

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)