Point o is the centre of the circle. what is the value of x? (assume that lines that appear to be tangent are tangent)

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

The square root of 9x plus 7 plus the square rot of 2x equall to 7