3^2-2*4/-30+2*4^2?

Question

there's that pasky evaluate again...
my answer was: 28/-448
Again, I was at the mercy of a calculator.
I am aware that I am not seeing what the
progress of the work is.

Answer 1

Remember...

P,E
M,D
A,S

parenthisis exponets

multiply divide

add subtract


please excuse my dear aunt sally

(first letter of each word is a way to remember it)



but i think its --


3^2=6- (2*4)= -2
-30+(2*(4^2))=2

-2/2=-1<----------negative 1

Answer 2

Assuming that "^" represents an exponential sign and means "raised to" and that "*" means multiply, then Paul D gave you the correct answer. Based on order of operations, this breaks down as follows:

9 - {2(4/-30)} + 2*16 exponentials first
9 - (4/-15) + 32 multiply and also simplify the fraction
9 + (-1)(-4/15) + 32 not certain your level of math but trying to show the two negative signs becoming a positive sign

9 + 4/15 + 32

41 4/15 or using 15 as common denominator 619/15

As stated above this answer is dependent on whether I interpreted your mathematical operation sign's correctly.

I used to teach intermediate algebra at a couple of different community colleges. Usually when teaching "order of operations" problems, the answers come out to much more even numbers than this answer did. It makes me wonder if I interpreted your algebraic statement correctly or whether you copied it from your page or book to the computer correctly. Just as a heads up, I recommend you check over the problem and make sure it's copied correctly.

Addition - hang on a sec - that division sign may be an issue. Written on the computer that division sign might be misleading. Is this expression as seen on the computer reflecting the grouping as shown in your book or paper? If not, can you rewrite your algebraic expression using parenthesis so we can judge better where that division sign figures into this problem? As it's written above, Paul D's answer is still the correct one. However if the "grouping" is different from the way it shows on the screen then a much different answer is possible. For example, if the algebraic expression is actually (3^2-2*4)/(-30+2*4^2) then the answer would be (9-8)/(-30+32) which equals 1/2. This answer is more in line with what I mentioned above regarding "order of operations" problems.

So is the original expression correct as you wrote it or do you need to edit it so we can see the correct groupings?

Answer 3

13

Answer 4

3^2 - 2*4 /(-30) + 2 * 4^2
9 - 16/-30 + 2 * 16
= 9 + 8/15 + 32
= 41 + 8/15
= 41+0.533
=41.533

Answer 5

Do all of the powers first.
Then multiply and divide left to right across the problem.
Lastly add and subtract left to right across the problem.

I'm not sure if the division in the middle is meant to split the problem into a fraction, or if it is a single division sign.

Hope this helps with the order of operations. Good Luck.

Answer 6

=9 - 8/-30 + 32
= 41 4/15

other answers possible

Answer 7

69

Answer 8

3^2=6- (2*4)= -2
-30+(2*(4^2))=2

-2/2=-1<----------negative 1

Answer 9

i'm in over my head on that one but I can do drug calculations at work...that's all I need to do.