What is the result of adding these two equations? \begin{aligned} -5x-9y &= 3 5x-9y &= -2 \end{aligned}
−5x−9y
5x−9y


=3
=−2

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36

What is the slope of the line that contains the points (-2,1) and (0,-3)