## anonymous one year ago evaluate this expression when s=7, a=5, m=3, and t=4

1. anonymous

|dw:1434039934968:dw|

2. anonymous

Basically substitute those numbers for your variables in the equation

3. anonymous

Try plugging in the numbers yourself :)

4. anonymous

I got 137

5. anonymous

|dw:1434040152742:dw|

6. anonymous

|dw:1434040218159:dw|

7. anonymous

Try again :)

8. anonymous

s=7, a=5, m=3, and t=4 \[2a ^{2} + st -3m = 2(5)^{2} + (7)(4) -3(3) = 69\]

9. anonymous

I got 119

10. anonymous

119

11. anonymous

Simply plug it into your calculator and you should get the right answer

12. anonymous

@happyrosy It should be 10^2

13. anonymous

(2a)^2 (2 times 5)^2 10^2

14. anonymous

100

15. anonymous

So 100 + 28 - 9 = 119

16. anonymous

No it is actually 2(5)^2 = 50

17. anonymous

Use the calculator. You'll get that answer

18. anonymous

lol yall are confusing me

19. anonymous

The 2a is in parenthesis… they must be multiplied first.

20. anonymous

You should put parenthesis around whatever you do in the calculator

21. anonymous

You have to solve 5^2 first in 2(5)^2 = 2(25) = 50

22. anonymous

@Wolverine32 We need a neutral person

23. anonymous

2a isn't in parenthesis. Just a is. So focus on the 5 first and then go for the exponent, which is 2. 5 squared = 25. Multiply that by 2 you get 50

24. anonymous

http://prntscr.com/7fsczz 2a is in parenthesis.

25. anonymous

so is it like this 2(5)^2+7(4)-3(3)

26. anonymous

You gave the problem like (2*5)^2 + 28 - 9

27. anonymous

simply put the number to the alphbet (2a)^2+st-3m s=7 a= 5 m=3 t= 4 y=2^x-1 it should look like this know put it in ur ti 84 calutor (2*5)^2+7*4-3*3.

28. anonymous

^ Precisely.

29. anonymous

the answer is going to be119

30. anonymous

Yes :)

31. anonymous

Oh okay. So it is actually \[(2a)^2\] not \[2a^2\]

32. anonymous

great job

33. anonymous

Sorry for the confusion. Lol! XD

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