Amusic teacher had noticed that some students went to pieces during exams. he wanted to test whether this performance anxiety was different for people playing different instruments. he took groups of guitarists, drummers, and pianists and measured their anxiety during the different exam they took. he also noted the difficulty level of the exam they were taking. he wanted to see whether the type of instrument played affected performance anxiety when controlling for the grade of the exam. what analysis should he use?

no not all of them.

step-by-step explanation:

some of them have a square base.

a triangular prism is a 3 dimensional shape composed of triangles and rectangles. it is made from two triangular bases and three rectangular sides.  

what are you doing do you need examples of variable questions?

step-by-step explanation:

5a-1=9               bring the one over the =

5a=10                     divide by your variable

a=2

brainliest? ?

here try this one

3a-24=0

a 90 degree rotation across the the origin followed by a reflection across the x-axis.

step-by-step explanation: