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in the figure below, o is the centre of a circle where angle ocd is an equilateral triangle. angle oab=20* and angle aod=127*. find angle boc.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

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.

Which system of linear inequalities is represented by the graph?