Answer:
a obtuse it's more than a 90 degree angle and scalene
I think pencil and paper would be the best method
9.) 3
10.) 1
11.) x-axis
12.) 4
13.) y-axis
800 + 16x = 720 + 21x. Cancel out the 720 to get 80 + 16x = 21x. Subtract 16x from both sides to get 80 = 5x. Divide by 5 to get 16 = x, or x = 16. 16 hours. The charge is 800 + 16(16), = 720 + 21(16) which = 800 + 256 = 720 + 336 which = 1,056 = 1,056. Hope this helped!
