What is the value of x? (3 pts) 90°
A. 90
B. 100
C. 80
D. 50
60°
1100
O 90°
O 100
O 80
O 50°
1
17
3 points

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

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%

Vanessa earns a base salary of $400.00 every week with an additional5% commission on everything she sells. vanessa sold $1650.00 worth of items last week.