Alocal high school has 1196 students with 368 freshmen, 368 sophomores, 239 juniors, and 221 seniors. what is the relative frequency of students who are not seniors at this high school?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.

5, 6, 10 question: a. determine whether the side lengths form a triangle. (explain your reasoning) b. if it is a triangle, determine whether it is a right, acute, or obtuse triangle. (show your work)