Answer: a) 15:26, and b) 15:11.
Step-by-step explanation:
Since we have given that
Number of graded tests = 15
Number of total tests = 26
Number of ungraded tests is given by

a) Proportion of all exams has Dr. Fitxgerald graded is given by
15:26.
b) Ratio of graded to ungraded tests is given by 15:11
Hence, a) 15:26, and b) 15:11.
First you need to simplify the left side of the equation to get

Then you add by two on both sides to get

Finally you divide by 2 on both sides to get
Based on the answers I would say that it is 105
This is assuming that C = A+ B ( 105 = 45 + 60), but i'm not certain because you didn't provide all the information needed.
Hope this helps! ;)
Answer:
-4 5/12
Step-by-step explanation:
because the lcm of 3, 2 and 4 is 12 and if u calculate the whole numbers u get -12 + 8, which equals -4
8/7= 7/2x
2x= 16*7/8
2x =14
X=7