Question

1. 7/8 - 1/2

2. A security camera rotates 30° every 10 seconds. how long does it take the camera to rotate 360°?

Answer 1

1.
make denom same
7/8 and 1/2
8 is common
1/2 times 4/4=4/8

7/8-1/2=7/8-4/8=3/8



2.
time/degrees
10/30=t/360
1/3=t/360
times both sides by 360
120=t

120 seconds or 2min

Answer 2

for your first question: find a common denominator first
for your second question :whats 360 divided by 30??