If a quadrilateral is a parallelogram, then

a.
its opposite angles are supplementary
b.
its consecutive sides are congruent
c.
its consecutive angles are congruent
d.
its consecutive angles are supplementary

Alicense plate is to consist of 44 digits followed by 55 uppercase letters. determine the number of different license plates possible if the first and second digits must be? odd, and repetition is not permitted.

Use multiples to write two fractions equivalent to 7/9. 14/18, 8/10 6/8, 21/27 10/12, 28/36 14/18, 21/27

The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22