Alex had $40 to spend on his party. He spent $19 on party decorations and then spent the rest of the money on party favors for 7 guests. Using the strip diagram and the letter x to represent the unknown quantity, which equation could be used to find the amount of money spent on each guest?

Marina baked cookies. she gave 3/4 of the cookies to the scout bake sale. she shared the remaining 6 cookies with her friends. how many cookies did marina bake?

What is the result of adding the system of equations? 2x+y=4 3x-y=6

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