Posted by drew on .
f of x = the square root of 2x minus 5
Find f (27)
A. 2
B. 3
C. 5
D. 7
D
not sure on this stuff, could you explain the steps?

algebra 
Steve,
just substitute in the value for x:
If f(x) = √(2x5),
f(27) = √(2*27  5) = √(545) = √49 = 7