There are 22 students in a class. 15 of these students study Physics (p) and 17 study Chcinistry (C). 3 study neither Physics nor Chemistry. Find the number of students who study both Physics and Chemistry. the final answer is 13 and i cannot understand it pls help.

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt

the answers are in the images, i received 100% on this assignment. hope this !

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