*extra points* can someone explain how to graph y= 2x - 1 ?

The -1 in the equation means that the y intersept is (0,-1) on the y axis. The 2x means the slope is 2 and the next point would be 2 points up and 1 point over because of the 2/1 or 2.  Your next point form the y-intercept would be (1,1) the (3,2) and so forth.

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c

answer is c

step-by-step explanation:

81/12=324/x

x=48