Show, by using simultaneous equations, that the line y = 5x - 3 is a tangent to the curve y = x + x + 1

Will give brainliest what is the value of x? enter your answer in the box.

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?

Mr. thompson is on a diet. he currently weighs 260 pounds. he loses 4 pounds per month. what part of the story makes the relationship not proportional?