Consider the problem of counting, in a given text, the number of substrings that start with an `A` and end with a `B`. For example, there are four such substrings in `CABAAXBYA`. Design a brute-force algorithm for this problem and determine its efficiency class [in pseudo code!].

Verify each identity[tex] \frac{csc}{cot \: x \: + \: tan \: x} = cos \: x[/tex]

Answer these and get 40 points and brainliest

Ahousehold consists of a married couple and their twin five-year old daughters. the couples children had no income and lived with their parents all of last year. how many exemptions can the couple claim on last years tax return or they file with the “ married filing jointly “ status? a. 4 b. 5 c. 3 d. 2