Atriangle in the coordinate plane has coordinates of (2,3), (-4,-5), and (-2, 4). it is reflected about the x-axis. what are its new coordinates?

If a • b*2 = 1.8 x 10*-7, and c•b/d = 7.2 x 10*-4, find the value of a•d*2/c*2

Which expression is equivalent to? assume x > 0 and y > 0.

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of