the length of one side of a triangle is 3 feet less than twice the length of its second side. the length of the 3rd side is 2/3 of the sum of the lengths of the first 2 sides. find the length of all 3 sides if the perimeter of the triangle is 6.5 feet

Answer asap ill give ! ’ a sample of radioactive material decays over time. the number of grams, y , of the material remaining x days after the sample is discovered is given by the equation y = 10(0.5)^x. what does the number 10 represents in the equation? a. the half-life of the radioactive material, in days b. the amount of the sample, in grams, that decays each day c. the time, in days, it will take for the samples to decay completely d. the size of the sample, in grams, at the time the material was discovered