The first square number is 1, and the sum of the first 20 square numbers is 2870. Work out the sum of the first 21 square numbers.

An association of art museums releases a study reporting that museums with restaurants have a greater number of annual visitors. Which statement describes the best conclusion to draw from the study? A.

What is the value of the expression. - 2/9 - (-5/9) =

Equivalent fractions for 9/11, 15/17, and 2/3 using the least common denominator.

Using technology, determine the present value given that you make quarterly payments of $1,635 at 4.2% compouded quarterly over a 3 year period. Round your answer to the nearest cent. a. $15,168.06 c. $19,180.84 b. $19,188.94 d. $18,344.05

The minute hand of a clock is 3 inches long. How far does the tip of the minute hand move in 5 minutes

a boat going upstream at 4 mph then travels downstream at 10 mph. what is the rate of the boat in still water

At a pet store, the ratio of female birds to male birds was 7:4. Write a sentence explaining what this means.

Factor 5x^2a^2 - 19xa^2 - 4a^2. Show your work.

The diagonals of a parallelogram are 2.3 cm and 3.2 cm long. can you tell if the parallelogram is a rhombus

The machine has 30 yellow balls, 45 blue balls, and 75 pink balls. Suppose the store purchases a shipment of 2,000 rubber balls. How many balls of each color should be expected in the shipment?