Determine the values of a and b for which the two lines ax 2y 1

and

6x 4y b

(a) have exactly one intersection point. ​

How can writing phrases as algebraic expressions you solve problems?

At store a, erasers are sold individually. the cost y of x erasers is represented by the equation y=0.75x. the costs of erasers at store b are shown in the graph.

Apasta salad was chilled in the refrigerator at 35° f overnight for 9 hours. the temperature of the pasta dish dropped from 86° f to 38° f. what was the average rate of cooling per hour?