## OnlyIn1D 2 years ago Simplify the following expression. x − 4y + 5z − 3x − y + 2z = ? 2x − 5y + 7z −2x − 5y − 7z −2x − 5y + 7z −2x −5y + 3z

1. cwrw238

add like terms eg x - 3x = -2x

2. OnlyIn1D

huh?

3. cwrw238

iits a subtract but u can look upon it as add x + (-3x) = -2x

4. xoya

x − 4y + 5z − 3x − y + 2z Re-arrange them and then solve x-3x-4y-y+5z+2z -2x-5y+7z :)

5. xoya

It's option number C :)

6. OnlyIn1D

okay thanks

7. xoya

8. OnlyIn1D

@xoya Evaluate: 16 − 10 ÷ 2 + 3 6 8 14 0

9. OnlyIn1D

i got 16 is that correct

10. cwrw238

the rule here is to work out the division first then work from left to right

11. OnlyIn1D

i mean i got 14 is that correct

12. cwrw238

16 - 10 / 2 + 3 = 16 - 5 - 3 = 11 - 3 = 8

13. cwrw238

following the following rule PEDMAS in order of priority parentheses, exponent, divide multiply add subtract

14. OnlyIn1D

isn't it 16 - 5 +3

15. cwrw238

so you see how i did the division first?

16. OnlyIn1D

so then 11 + 3 then that will be 14

17. cwrw238

oh sorry u r right yes 14

18. OnlyIn1D

Bob's Car Rentals charges a flat rate of \$35 per day plus \$3.50 per mile. If the number of miles is represented by "m", which algebraic expression represents the overall rate for the day using "m"? 38.50m 35m + 3.50 35 + 3.50m 31.50m

19. OnlyIn1D

@xoya

20. OnlyIn1D

@cwrw238