24 Karat gold is considered to be about 75%pure gold. Why is 18-karat gold considered to be a mixture rather than a pure substance

Consider the function represented by the equation 1/2 j + 1/4 k equals 3 which shows the equation written in function notation with j as the independent variable

Write an equation for the function that includes the points (2,100)and (3,100)

The price of a dozen eggs was $1.63. suppose the price increases m dollars per dozen and then the price decreases $0.12 per dozen. which expression represents the current price of eggs after the two price changes?