If (x - 5) is a factor of f(x), which of the following must be true?
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aroot of f(x) is x = -5.
a root of f(x) is x = 5.
both x = -5 and x = 5 are roots of f(x).
neither x = -5 nor x = 5 is a root of f(x).

a root of f(x)= 5

Step-by-step explanation: they did not give you the equation so there is no way you can assume -5 is a root as well so when you take x-5 and set it equal to 0 you add five to both sides causing x to equal 5

2/3

step-by-step explanation:

11.2

step-by-step explanation:

when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.

tan43 = x / 12

move 12 over by multiplying each side by 12

12tan43 = x

x = about 11.2