Instead of adding or subtracting 2pi (that's for radians only), just add or subtract 360 degrees to your angle.
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Answer:
1. x=±4
2. t=±9
3. r=±10
4. x=±12
5. s=±5
Step-by-step explanation:
1. x^2 = 16
Taking square root on both sides

x=±4
2. t^2=81
Taking square root on both sides

t=±9
3. r^2-100=0

r=±10
4. x²-144=0
x²=144
Taking square root on both sides

x=±12
5. 2s²=50

s=±5 ..
A = albums, m = # months
$200m + 12a = 644
$200(1) + 12a = 644
200 + 12a = 644
12a = 444
a = 444/12
a = 37
Answer:
A
Step-by-step explanation: