Algebra 1 pls help! Brainilest for best correct answer

C

Step-by-step explanation:

since f(x)= 2x+1 ,  then F(a+2) = 2 (a+2) + 1

everywhere you see x , you replace x with (a+2)

F(a+2) = 2(a+2) + 1

F(a+2) = 2a+ 4+ 1

F(a+2) = 2a+5

therefore the answer is C

i dont know men

step-by-step explanation:

yx = 36

step-by-step explanation:

cos f = opposite side/ hypotenuse

cos f = yw / yx

we know cos f = 4/9 and yw =16

4/9 = 16/yx

multiply each side by yx

4/9 yx = 16/ yx * yx

4/9 yx = 16

multiply each side by 9/4

9/4 * 4/9 yx = 16 *9/4

yx = 36