Sum of 2/3 + (-1/3) i cant find the answer

Mary spent a total of $323.14 for a party. She spent a total of $200.22 on food, plus an additional $30.73 for each hour of the party. How long was the party?

Which statements are true? Select all that apply. Centigrams are larger than decigrams. Hectometers are smaller than kilometers. Dekaliters are larger than kiloliters. Grams are smaller than dekagrams.

You randomly draw a marble from a bag of marbles that contains 7 blue marbles, 2 green marbles, and 1 red marble. what is the probabiablity

Bike path A is 4 miles long bike path B is a total of 37miles, how many times did she bike each path?

A rectangle has a perimeter of 4848 feet and a length of 1414 feet. Which equation can you solve to find the width?

Of the 800 seventh grade students and 640 eighth grade students at Knox Middle School, 90 students will be chosen at random to attend an assembly.

A square prism has a height of 14 inches and a base with an area of 20 square inches. A cylinder is inscribed inside the prism. Which statement about the volume of the cylinder, V, is true?

A coffee pot holds 2 3/4 quarts of coffee. How much is this in cups?

A cube has depth of 9cm. what is the volume of the cube

Mary Hernandez had a policy with a $500 deductible which paid 80% of her covered charges less deductible. She had medical expenses of $10,000.00