rectangle abcd is symmetric with respect to y-axis. points a and b belong to the parabola y=x2. points c and d are on the parabola y=−3x^2+k. find k if the area of the rectangle is 66 and length of ab is 6.

Derricks dog sitting and darlene's dog sitting are competing for new business. the companies ran the ads shown.which dog sitting service is more economic to use if you need 5 hours of service? explain.

Jordan has $5.37, which he is using to buy ingredients to make salsa. he is buying one red pepper for $1.29 and three pounds of tomatoes. if jordan has exactly the right amount of money he needs, what is the price per pound of the tomatoes? choose the correct equation to represent this real-world problem. solve the equation and verify the reasonableness of your answer. a pound of tomatoes costs .

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?