Ayuda porfa doy corona pero sr nesecitan dos respuestas a la mejor respuesta dare corona​

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

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

The length of a rectangle plus its width is 24 cm. the area is 143 square cm. what are the length and width of the rectangle?