Please help me I need answers for my homework

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

What describes horizontal cross section of the right rectangle 6m 8m 5m

Suppose that prices of a gallon of milk at various stores in one town have a mean of $3.71 with a standard deviation of $0.10. using chebyshev's theorem, what is the minimum percentage of stores that sell a gallon of milk for between $3.41 and $4.01? round your answer to one decimal place.