Answer:
C, 60 degrees
Step-by-step explanation:
Since "8" is the largest length on the triangle, that must mean that 90 degrees is the largest angle of the triangle. Plus, we know that whenever an angle is 90 degrees, no other measure of the triangle can be < 90 degrees. Therefore the answer cannot be B. Since "8" and "7" are very close (7 and x are a "pair" just like 8 and 90 degrees were), we can guess that x must be relatively close to 90 degrees. Therefore the closest answer to 90 degrees without being greater than 90 is C, 60 degrees.
This is the commutative property (of addition, but this applies to multiplication as well)It doesn't matter which order the numbers are added in, the same result will be achieved.1+2 = 2+12*4 = 4*2
-2(6-8)
-2(-2)= 4
-2(6 - 8) using distributive property
(-2 x 6) (-2 x - 8)
-12 + 16 = 4
so if she did the above step, she should get 4
the error might be that she failed to distribute to both 6 & -8 (but idk since technically idk what she did)
hope this helps