Answer: 
note: replace 'j' with any other letter you want, assuming your book does not use this letter.
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Explanation:
j = jenny's score
t = Terrance's score
(4/5)*t = 4/5 of Terrance's score
(4/5)*t+5 = 5 points greater than 4/5 of Terrance's score
represents the inequality connecting Jenny's score and Terrance's score. Saying "her score is no less than some amount" is basically saying "the lowest her score can go is that amount". A specific example: if we say "her score is no less than 12" then this means "her score is 12 or more" and we can write 
13/4 would be 3 1/4. this is because 4 can go into 13 3 times leaving 1/4 left over. hence making it a mixed number. as a whole number it would be 3.25 because 4 can go into 13 3 times and 1/4 is .25, hope this helps!:)
Add the whole numbers.
Then add the numerators.
2 2/6 + 3 2/6 = 5 4/6
Simplify the fraction
5 2/3
