Iowe my friend miguel $4.00. i also owe my friend gloria $7.50. which equation correctly shows this relationship?

a. -4 - 7.50 = 11.50

b. 7.50 - 4 = 3.50

c. 4 + (-7.50) = -3.50

d. -4 + (-7.50) = -11.50

Write an equation of the line given the two points below (write your equation in slope-intercept form, y=mx+b): (-4, 4) and (6, -4)

Simplify the expression. -2/5(10+15m-20n)

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%