Identify the angles as complementary or supplementary and then find the value of x

supplementary 65
complementary 155
complementary 65
supplementary 155

find the value of x in the figure.
the figure shows an x and a 40 degree

40
50
140
180

which equation can be used to find the value of x in this figure
the figure shows 106degrees and x

90+x=106
106-x=74
106+x=180
none of these

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