One and a half = 1.5
Three and a half = 3.5
1.5 + 3.5 = 5.
X^2+ (y+8)^2 = 81.....this is C.
X^2 + y^2 + 16y +64=81 so x^2 + y^2 + 16y = 17.....this is D.
So I’d say C and D are correct
It should take six hours for him to stay below $315 after you add the flat rate of $180. Goodluck :)
The answer is 5,12,13 as when you plug these into the Pythagorean theorem :
5^2 + 12^2 = 13^2
25 + 144 = 169
13^2 = 169
Hope this helps :)
