The students in Mrs. Thompson's class have to do a book report. They were given the choice to read a historical fiction, non-fic
tion, or biography. If there are twenty-five students in the class, how many of them chose to read a non-fiction book?
A. 8
B. 11
C. 16
D.32
A. 8
B. 11
C. 16
D.32
2 answers:
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Answer:
A=2, B=3, C=5
Step-by-step explanation:
Two polynomials are equal for all values of the variable if the corresponding coefficients are the same. The way to solve the problem is to multiply the RHS, rewrite it in a more orderly way
Now, for the two polynomials to be the same we need to have, at the same time
You might notice that we have more conditions than variables, but you can consider one of the two in the middle as a "check" option.
Now, grabbing the value from the first condition into the second we get B=3. Replacing both value in the third we see that the equality still holds, and replacing into the fourth we get C =5.