If x+y=10 and x-y=4,find the value of x*x-y*y

How many lines can be drawn through points j and k? 0 1 2 3

Will give brainliest b. describe the function over each part of its domain. state whether it is constant, increasing, or decreasing, and state the slope over each part.

Abook store is having a 30 perscent off sale. diary of the wimpy kid books are now 6.30 dollars each what was the original price of the books