Tina has been dieting for a total of 13 weeks. she lost 3 pounds on the first week of her diet, but gained back a pound on the second week. on each remaining week of her diet, she lost 2 pounds. how many pounds has tina lost in all? a. 26 pounds b. 20 pounds c. 22 pounds d. 24 pounds

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

Find the zeros of each function. f(x) = x^2 + 5x - 6

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.