In a class of 72 pupils, the ratio of passes to failures in the final exam was 8: 1. how many pupils passed the exam?

p. s show working out.

Hello i need some with trigonometric substitutions. [tex]\int\limits^a_b {x} \, dx[/tex]

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? 8,000 + 24x 8,000 − 24x 8,000 + 2x 8,000 − 2x

What is the slope of a line that is perpendicular to y = 3x + 1