(x+5)*7=133
7x+35=133
7x=98
x=98/7
x=14
The temperature at 5 am was -3 degrees
12-15=-3
I think the answer is D hope this helps
Answer is 8
Work Shown:
f(x) = sqrt(5*x + 4)
f(12) = sqrt(5*12 + 4) ... replace every x with 12
f(12) = sqrt(60 + 4)
f(12) = sqrt( 64 )
f(12) = 8
