Jessica has a bag of marbles. there are 7 red and 3 blue. she reaches in and pulls out a red on the first draw. she then reaches in for her second draw, without replacing the first marble. what is the probability that jessica will pull out 2 red marbles

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

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

Emily is entering a bicycle race for charity. her mother pledges $0.90 for every 0.75 mile she bikes. if emily bikes 18 miles, how much will her mother donate?