Determine the value of x when f(x) = 8. f(x) = 7 1 − x What is the value of x when f(x) = 8?

x=63

Step-by-step explanation:

If f(x)=8 and f(x)=71-x, these can be set equal to eachother

71 - x = 8

Subtract 71 from both sides to isolate the variable

- x = -63

divide both sides by -1 because the variable can not be negative

x = 63

hope this helps! :)

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58