How many solutions would the following system of equations have? y=3x+2, and y=3x-4 is it 0, 1 or infinite ?

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.

Are triangles the congruent? write the congruency statement.what is the congruency that proves they are congruent? what is the perimeter of ∆pqr?

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)