Tuesday, November 22, 2005

Questions

Substitutions


simplify each expression. x= 5, y= 10

1) 13x+10y+8-10x+5y-3 = ??

2) 15x+2y-6-10x+y-3 =??

3) 20x-4y+5-5x+4y-5 =??

Good Luck.. and dont forget to study for the test =)

Answers:

1) 13x+10y+8-10x+5y-3
3x+15y+5

3(5) + 15(10) + 5
15+ 150 + 5 = 170

Answer = 170

2) 15x+2y-6-10x+y-3
5x + 3y - 9
5(5) + 3 (10) - 9
25 + 30 - 9 = 46

Answer = 46


3) 20x-4y+ 5-5x+4y- 5
15x
15(5) = 75

Answer = 75

Did you get it right?? well i have to study NOW .. Bye

Daureen N.





0 Comments:

Post a Comment

<< Home