Given segments uv, vw, and uw are midsegments. Of ts = 21, uw = 13, and vw = 19, what is the perimeter of \triangle△rst?

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Polynomial that can be factored as (3x-4)(3x+4)

Suppose sat writing scores are normally distributed with a mean of 497 and a standard deviation of 109. a university plans to award scholarships to students whose scores are in the top 2%. what is the minimum score required for the scholarship? round your answer to the nearest whole number, if necessary.