Answer:
32
Step-by-step explanation:
1/2x+12=28
-12 -12
1/2x=16
×2 ×2
x=32
Answer: 1349
Multiply 71 by 19
hertz (Hz)
Explanation:
The SI unit for frequency is the hertz (Hz). One hertz is the same as one cycle per second.
I DON'T know why?
44 feet