Without needing to graph, determine the number of solutions for the system. y = 4x + 2 and y = 4x - 3

Please I know the answer but I need the working out

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?

Wich statement could be used to explain why the function h(x)= x^3 has an inverse relation that is also a function

A. what does the point (4, 122) represent? b. what is the unit rate? c. what is the cost of buying 10 tickets?