Help asap! for a quiz 1) x+y+z=9
-2x+y+2z=3
x-4y-z=2

2) 2x-4y=-4
3x-y=4

3) -3x+2y+5z=-10
-x-2y+3z=6
2x-y-z=4

4) 2x+3y-z=9
-2x-y+2z=2
x+y-2z=3

5) y=7-x
x+3y=7

At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. the cyclic nature of wind and moving sand determines the shape and location of large dunes. at a test site, the prevailing direction of the wind did not change noticeably. however, the velocity did change. fifty-nine wind speed readings gave an average velocity of x = 1075 cm/sec. based on long-term experience, σ can be assumed to be 245 cm/sec. (a) find a 95% confidence interval for the population mean wind speed at this site. (round your answers to the nearest whole number.) lower limit cm/sec upper limit cm/sec