Decide if the following biconditional statement is true or false:
A shape is a quadrilateral if and only if it is a
square.
True or False

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 price of a car has been reduced from $19,000 to $11,590. what is the percentage decrease of the price of the car?

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6