The correct answer is b) the function has an inverse because if passes the horizontal line test.
Ok so 1.2 is the answer you get if you divide them
and you can also say one because its counting by ones
The answer is 3
Multiply 6 by 3 to get the total amount of money for the books then minus the answer 18 which you get from 6 x 3 = 18
Then minus 18 from 21 to get $3
21 - 18 = 3
Top answer is -4 because when you divide by a negative your answer will come out negative and bottom answer is 6 because when you multiply two negatives it turns into a positive
