Which of the following statements about parallelograms are true? Select all that apply.

options:

All parallelograms have 4 right angles.

All parallelograms have rotational symmetry of 90°.

All parallelograms have rotational symmetry of 180°.

A rectangle is a parallelogram.

All parallelograms have exactly 4 lines of symmetry.

If sin(x) = 0 and cos(x) = 1, what is tan(x)?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.