What is the factored form of the expression t^2-81 a. ( t + 9 ) ( t - 9 ) b. ( t + 81 ) ( t - 81 ) c. ( t + 9 )^2 d. ( t - 9 )^2 i believe it's a, but i'm not sure. .

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Venita is sewing new curtains. the table below shows the relationship between the number of stitches in a row and the length ofthe row. sewingnumber of stitches length (cm)51 131532024306what is the relationship between the number of stitches and the length? othe number of stitches istimes the length. o. the number of stitches is 3 times the length.

Jude is making cement for a driveway. the instructions show the amount of each ingredient to make 1 batch of cement. complete each statement to adjust the ingredients for each new situation if jude uses these instructions.