In order to solve for x which trig function would be used cosine sine or tangent

Find all the values of x that make 0.1x + 0.25(102 - x) < 17.10 true.

The price of a visit to the dentist is calculated according to the formula 50+100n50+100n where nn is the number of cavities the dentist finds. on your last visit to the dentist, 22 cavities were found. what was the cost of your visit?

What fraction is equivalent to 0.46464646··· a. 46⁄999 b. 46⁄100 c. 46⁄99 d. 23⁄50