To find the sum and difference of the two rocks, you would do:
it's like that because the amount is 45/100 so decimals are written like that
D 288 1/3 = 96/288 3/4 = 216/288 5/32 = 45/288 8/9 = 256/288
1/3 times 96 3/4 times 72 5/32 times 9 8/9 times 32
Hope This Helped! :3
125+42= 167
180-167= 13 degrees
Triangles is always equaled to 180 degrees.
Answer: choice 3
I am pretty sure this is the answer