A dump truck weighs 11.25 tons when empty. A conveyor belt pours sand into the truck at a constant rate of 14 ton per minute until it is full.

Let t represent the elapsed time in minutes. Let w represent the weight of the truck after t minutes.

Write an equation for w in terms of t.

What are “like terms”? why can we only add like terms?

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.

What is always true about a positive integer raised to a negative odd power?