Adding and subtracting fractions

If there are 60 seconds in an minute, 60 minutes in an hour, 24 hours in a day, and 7 days in a week, how many seconds are in a week? Hint: Use a calculator to solve this problem.

Which event prevented Descartes from publishing The World after he was done writing the book?

Pau is standing in front of a museum exhibition. Whe he turn his head 60 degrees to the left he can see a sttue by Bonatello. When he turns his head 60 degrees to the right, he an see a staty by Della Robbia.

3+11 (x+y) - 4 (x+y) ^{2}

at noon the teparature was 4'C. Over the next two hours the temparature dropped another 11 degrees. then every hour until 4:00 the temparature rose 2 degrees. What was the temparatureat 4:00

Find the missing length in the right triangle. 3 in. 12 in.

A manufacturer of computer printers purchases plastic ink cartridges from a vendor. When a large shipment is received, a random sample of 235 cartridges is selected, and each cartridge is inspected.

If the exterior angle of a regular polygon is 22.5, how many sides does it have?

Describe the similarities and differences in find the lateral areas of a prism and a pyramid that have congruent bases

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