Answer:
20
Step-by-step explanation:
3x + x + 100 = 180 (sum of angles on a straight line)
4x = 180-100
4x=80
divide both sides by 4
x=20

The number "x" is given by:
Therefore, we have:

is equation of circle which have radius equal 5 and center in (0,0) point
Answer: 3 toys
Step-by-step explanation:
Equation: 60-5t=45
Solving: 5t=60-45
5t=15
t=3