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?

32/80  

91/140

the last one 54 doesn't go into 45. 54/100 ?

step-by-step explanation:

3x + 4y -25 =0 represents the amount of change sianna should recieve

2 & 7

step-by-step explanation:

he climbs 300 ft/hr at a constant rate. the peak is at 1,500 ft.

when going up, he reaches 600 ft in 2 hours. remember, that he is going in a constant rate. divide 600 with 300:

600/300 = 2

assuming that he takes the same route back (meaning that it's a 1500 ft route back, you can solve.

note also that you are solving when he gets back to 600 ft after he reaches the peak.

first, find the amount of hours it takes to get up the peak. divide the total amount (1500), with the ft/her (300) to get the amount of hours (x):

1500/300 = x

x = 5

it takes jamie 5 hours to get up. now, he is returning down, and reaches 600 (his current destination). remember that he climbs at a constant 300 ft/hr. divide 600 with 300:

600/300 = x

x = 2

now add the two numbers together.

x = 5 + 2 = 7

jamie takes 7 hours to go up the mountain and reach his current position when descending.

(total amount/constant rate) = (time).

remember that it is a constant rate, so in total, when he gets back down the mountain, it will take the same amount of time as when he goes up. the total amount for the round trip is: 5 + 5 = 10.

~

the answer is mp

step-by-step explanation: