What is the area of the trapezoid shown below? 240 / 9
Mastery po
Skill Sumi
Constructii
25
Pythagorea
4
Quiz 1:59
Practice w
units
Unit test

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

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%

Solve the following simultaneous equation by using an algebraic method (either substitution or elimination) 2x + 3y=-4 4x-y=11