If two sides of a triangle are 5 and 7 inches longer than the third side and the perimeter measures 21, find the length of each side of the triangle

Write a division equation you could use to find a, the number of miles ava is in charge of. what is the value of a? write your answer is simplist form

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

List the sides of δrst in in ascending order (shortest to longest) if: a ∠r =x+28°, m∠s = 2x+16°, and m∠t = x+12°