My friend is correct because by the HL Congruence Theorem, ∆MNP is congruent to ∆MKL. The hypotenuse and leg of one right ∆ is congruent to the hypotenuse and corresponding leg of the other right ∆. So, enough information was given to prove that x = 12.
First find how many students are sick the second year: 0.20 × 120 = 24 Then all you need to do is subtract: 120 - 24 = 96 So the number of students that got sick this year is: 96 students
