Noralie's car uses 20 gallons of gasoline to go 600 miles. Josh used the proportion 600 over 20 (600/20) = x over 4 (x/4) to find the number of miles Noralie's car can travel on 4 gallons of gasoline. Lisa says she can use a unit rate. Do you agree with Josh or with Lisa? Explain.

Acable company wants to provide cell phone service for residents on an island. the function for the cost of laying the cable from the island to the mainland is c(x)= 6.500 square root x2+4, where x represents the length of the cable in feet. what are the domain and range of the function? a) domain: all real numbers range: all real numbers greater than or equal to 17,000 b) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 17,000 c) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 13,000 d) domain: all real numbers greater than or equal to 13,000 range: all real numbers greater than or equal to 0

Which of the following expressions are equivalent ?

Which shows the graph of the solution set of 3y – 2x > –18?