A teacher gave her class two functions, f(x) = (x - 5] + 4 and g(x) = -x2 + 21, and asked for the solution(s) of the equation
f(x) = g(x). The answers given by four students are shown below:
Betty: only 4
Donna: only 5
Edward: 12 and 5
Gary: -3 and 4
Who found the solution correctly and why?

step-by-step explanation:

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c. 6tan80

step-by-step explanation:

see below

step-by-step explanation:

x+2> 6

subtract 2 from each side

x+2-2 > 6-2

x > 4

there is an open circle at 4 since is it is greater than and the line goes to the right