integers

if a equals sum of even integers from 2-20 inclusive and b is sum of odd integers from 1-19,inclusive. What is value of a-b?

1) 1
2) 10
3) 19
4) 20
5) 21

distance

If it took Carlos half hour from house to library yesterday,was the distance that cycle traveled greater than 6 miles? 1 mile=5280 feet 1) avg speed that carlos traveled from his house was more than 16 feet per second 2) avg speed that carlos traveled from his house was less than 18 feet per second ...

Trapezoid

In a Triangle abc,BE is // to CD, CD=20,BC=AB=6,AE=8 What is the area of trapezoid BEDC?

1)24
2)48
3)66
4)72
5)144

Not sure which approach to apply here? Should I take area of bigger triangle minus area of smaller triangle?

parallalism

In commercial garment construction,one advantage of serging over single-needle sewing is that the seam allowance is overcast as the seam is sewn instead of a separate process requiring deeper seam allowances.

-Instead of
-Rather than in
-Inc contrast with
-as opposed to
-as against being done in

Thanks for the explanation

salary

Jason's salary and Karen's salary were both p percent greater in 1998 than 1995. What is value of p?

1)In 1999 Karen's salary was $2000 greater than Jason's
2) In 1995 Karen's salary was $24440 greater than Jason's

Not sure if we are assuming p percent as same increase for both of them?

Thanks

Combination

Which is the correct expression for this problem? 8 students have been chosen to play for PCU’s inter�collegiate basketball team. If every person on the team has an equal chance of starting, what is the probability that both Tom and Alex will start? (Assume 5 starting positions) a) 6! 3!3! 8! 5!...

arthmetic

if XY=1 then what is the value of 2^(X+Y)^2/ 2^(X-Y)2^2

1)2
2) 4
3) 8
4) 16
5) 32

NOT sure what I did wrong here I think answer is 8. But correct answer is 16?