100 points to best !

1.)what is the slope of a line that is perpendicular to a line whose equation is 5y=10+2x ?

2.)line a is represented by the equation y=−2x+3 .
how do these equations compare to line a?
categories: parallel to line a, perpendicular to line a, neither parallel nor perpendicular to line a. equations: y=2x-1, y=-2x+5, y=1/2x+7.

3.)what is the equation of a line that passes through the point (5, −4) and is parallel to the line whose equation is 2x + 5y = 10?

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