$$ what is the ratio of question marks to dollar signs?

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?

In a tutoring session, 2/3 of an hour was spent reviewing math problems. adelina attended 3/4 of the tutoring session. how much time did adelina spend at the tutoring session?

Recall that two angles are complementary if the sum of their measures is? 90°. find the measures of two complementary angles if one angle is twenty dash nine times the other angle.