Solve the following system of equations for all three variables. 7x + 9y – 2z = 9

X – 9y – z = -3

- 8x – 9y + 5z = 6

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

What is the difference between the predicted value and the actual value

What is the range? can’t seem to find it out