For the function f(n) = 2n - 7, determine n when f(n) = 11
(its on goformative and i got the answer to be 15 but it says its wrong.

n=9

Step-by-step explanation:

f(n) = 2n - 7

we are asked to determine the value of n for which

f(n) = 11

Hence

11=2n-7

now we solve it for n

adding above equation 7 on both sides

11+7=2n-7+7

18=2n

dividing by 2 on both sides we get

9=n

Hence for n = 9 , f(n) = 11

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.