Which expression is a polynomial?

a. 9x^7y^-3z

b. 4x^3-2x^2+5x-6+1/x

c. - 13

d. 13x^-2

Three brothers share two sandwiches equally how much of a sandwich does each brother get

How do you get 27 only using the numbers 1,2,3,4

A shoebox in the shape of a rectangular prism is 10 inches long, 8 inches wide, and 6 inches tall. What is the surface area of the shoebox?

How many significant digits are in this number 85 000?

Jorge wants to find the most popular way for teens to volunteer in the community. He cannot decide between two methods. Option 1: He will ask every fifth person on each English class roster.

How can you use models to explain why 3.1=3.10?

Scientific notation for 82,300,000

Factor completely 12y+6

The density of atmosphere (measured in kilograms/meter3) on a certain planet is found to decrease as altitude increases (as measured from the planet's surface).

6. At a firefighters' pancake breakfast, the firefighters served 345 people and raised $1395. If the cost of a, an adult's ticket to the pancake breakfast, was $5 and the cost of c, a child's ticket, was $3, what was the number of adult tickets sold?