Alexa is designing a paper airplane whose final shape, when viewed from the top or bottom, is a trapezoid. A sketch of her
plane, viewed from the top, is shown on the left.
6 cm
2 cm
3 cm
What are the dimensions of one of the identical triangular pieces of the plane?
2 cm base, 3 cm height

1. are the triangles similar and if so why? what is the value of x? show your work.

Polynomial that can be factored as (3x-4)(3x+4)

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.