14. the difference of twice a number and 7 is 9.
15. ten less the quotient of a number and 3 is 6.
16. five times the sum of a number and 4 is –15.

i would say true? if the unit was informational and it "refreshed your understanding", then true.

step-by-step explanation:

one day the were 5 ducks, and their king told them to multiply their kingdom. so each went their own seperate way and met 4 other ducks on their journey.

when the ducks returned to their kingdom, it was discovered that there were 5 groups of 5 ducks. when the kind counted the number of ducks in total (including the ones he sent out earlier) he counted 25.

therefore 5 times 5 is 25.

the end. : )

b.   e = 7.5h

hope this , lovely!