Which expression is equivalent to 7(d+3)-3= a.7d b. 7d+18 c. 7d+21 d. 10d-3

B. 7d + 18

Step-by-step explanation:

7 ( d + 3 ) - 3

expanding , we have :

7d + 21 - 3

= 7d + 18

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

)

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