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 
24 boys and 40 girls because the ratio is boys to girls
First, Joe started the water and it was at full force. He filled it up to 9 inches. It took him 2 minutes to get to 9 inches. Then, he stopped it for 2 minutes because his mom called him to get a bar of soap. The water level was still at 9 inches when he stopped it. Then, he put the water to come down slowly because he wasn’t sure how much more he needed. He let the water go for 2 minutes. Then, he stopped the water when it was at 12 inches of water. He sat in the bath for 5 minutes until he decided he was to cold so he hopped out. The water then drained really fast. From 12 inches to 0 inches it took the bath 3 minutes.
Answer:
B.120
Step-by-step explanation:
The questions says in how many ways band she choose 3 of the 10 students
Using Combination Formula, which says
C = n! / (n! (n - r) !)
n represents the total number of students
r represents the students he want to choose
The number of combinations 3 out of 10
¹⁰₃C = 10! / (3! (10 - 3) !)
= 10! / 3! 7!
= 10*9*8*/ 3*2*1/ 7*6*5
= 3628800 / 6*5040
= 3628800 / 30240
= 120ways
Answer and workings in the attachment below.
