What is the best estimate of the product 3780 times 2

How do you use the elimination method for this question? explain, because i really want to understand!

Examine the two-step equation. − 7 4 + x 4 = 2 which property of operations allows you to add the same constant term to both sides? amultiplication property of equality bdivision property of equality caddition property of equality dsubtraction property of equality

Write the function for the graph. (1.8) (0,4)