an english instructor asserted that students' test grades are directly proportional to the amount of time spent studying. lisa studies 6 hr for a particular test and gets a score of 77. at this rate, how many hours would she have had to study to get a score of 97?

Lisa has to study for 7.55 hours.

Step-by-step explanation:

Since an English instructor has asserted that the relation between studies and test grades is proportional then we can find the time by unitary method.

∵ To score 77 Lisa has to study for 6 hours.

∴ To score 1 Lisa has to study for =

∴ For a score of 97 Lisa has to study =

                                                             = 7.55 hours

So Lisa has to study 7.55 hours to score 97 in the test.

number one is the correct answer

step-by-step explanation: dogs and cats are mentioned, no other animals

$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.