A carpet store charges $20 per square yard of a carpet after an initial installation fee. A customer paid a total of $800 for 30 square yards. a. Write an equation that gives the total cost of buying and installing a carpet as a function of the area of the room (in square yards) b. Find the total cost of buying and installing 42 yards of carpet.

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(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

Astudent showed the steps below while solving the inequality |x-4|< 1 by graphing.