At a contest, every correct answer earns you 5 points and every incorrect answer will deduct 3 points. jessica has a score of 66. if she answered 3 questions incorrectly, how many correct answers did she have?

15

Step-by-step explanation:

66=5x-3y

x=# right

y=# wrong

y=3

66=5x-9

75=5x

x=15

answer:

(-8,7)

explanation:

we know that  

f

(

−

3

)

=

7

therefore, if we wish to get the output as 7, in the function, we need to have our input to be -3.

looking at the function  

f

(

x

+

5

)

, what should the value of x be, such that the input in the function becomes 7?

we simply equate the terms,

x

+

5

=

−

3

x

=

−

8

thus, the point on the new function would be  

(

−

8

,

7

)

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

you can download it here