Can anyone help me in number 1 please

1a. yes

1b. y= 2x

Step-by-step explanation:

if you divide the length by 2, you get the number of the width, which gives you the equation y=2x.

13.46

step-by-step explanation:

16.80 x .20 = 13.46

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