Please help must equal 180
Solve for x.
x = [?]
2x + 9
8x + 1

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line

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?

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?