A triangle has interior measures of 45° and 50°. What is the measure of the third angle? 950
850
90°
50

check the picture below.

a

step-by-step explanation:

you need to add a picture

answer: hence, function will be

explanation:

since we have given that

cost of a new textbook = $85

according to question, the resale value of a textbook decreases by 25% with each previous owner,

so, our function becomes,

here, y is the total value of the text book after x owners.

hence, function will be