Triangle ABC has side lengths 8 inches, 17 inches, and 15 inches. Sofia uses the following steps to conclude that triangle ABC is not a right triangle. What mistake did Sofia make?

A. Sofia made a calculation error

B. Sofia used the length of one of the legs as c when she should have used the length of the longest side as c

C. Sofia does not know if the triangle ABC is a right triangle, so she cannot use the Pythagorean Theorem or it's converse

D. Sofia's conclusion is incorrect. When the sides of a triangle does not satisfy a^2+b^2=c^2, you cannot conclude that the triangle is a right triangle

It doesn’t show the question

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )