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Algebra I

2007-06-28 16:03:37 · 11 answers · asked by LAINIE 1 in Science & Mathematics Mathematics

11 answers

Remember your rules of precedence:
First, the stuff in the ( ). This adds to 12
Now you have two multiplications after which the products are subtracted. In numbers, this is 60-12, for which the answer is 48.

2007-06-28 16:07:30 · answer #1 · answered by cattbarf 7 · 0 0

follow this order of operations:
Parenthesis: evaluate all expressions inside parenthesis first.
Exponents: Evaluate all exponents (you dont have any)
Multiplication/Division: Evaluate any mult or div from left to right.
Addition/subtraction: Evaluate all addition and subtraction from left to right.

5(9+3) - 3 * 4
5 * 12 - 3 * 4 (I did the parenthesis first 9 + 3 = 12)
60 - 12 (I multiplied 5 * 12 = 60 and 3 * 4 = 12)
you do the rest.

2007-06-28 16:09:52 · answer #2 · answered by Jimmy 3 · 0 0

Order of operations - PEMDAS (Please Excuse My Dear Aunt Sally)

you do whatever's in Parenthesis first,
then Exponents (powers),
then Multiplication
and Division,
then Addition
and Subtraction.

So first, add the 9 and the 3 for 12. Now it's 5*12 - 3*4. No exponents, do the multiplications. That gives you 60 - 12. So, it's 48.

2007-06-28 16:09:51 · answer #3 · answered by Carl L 4 · 0 0

5(9+3)-3*4
= 5(12)-3*4
= 60-3*4
= 60-12
= 48

2007-06-28 16:43:24 · answer #4 · answered by Kemmy 6 · 0 0

PEMDAS(Parenthesis, Exponent, Multiplication, Division, Addition, Subtraction)
48

2007-06-28 16:09:33 · answer #5 · answered by Sky Guy 5 · 0 0

= (5 x 12) - (3 x 4)
= 60 - 12
= 48

2007-07-02 08:05:58 · answer #6 · answered by Como 7 · 0 0

you have to evaluate that problem in this order~
P~ paranthesis (spelling?)
E~ exponents
M~ multiplication
D~ division
A~ addition
S~ subtraction
except multiplication and division can be switched around judging on which comes first and same for subtraction and addition. to remember the acronym easily use this jingle ^.^ ~
P~ please
E~ excuse
M~ My
D~ dear
A~ aunt
S~ sally

then all you have to do is break it down! ~
5(9+3)-3*4
9+3=12
5*12=60
3*4=12
60-12= 48! ^O^

2007-06-28 16:24:43 · answer #7 · answered by Anonymous · 0 0

There are rules of hierarchy on resolving a complex mathematical expression.

First, resolve anything within parenthesis ( )
Next, resolve powers and roots,
Next, resolve multiplication and division,
Last, resolve addition and subraction.
5(9+3)-3*4
5(12)-3*4
5*12-12
60-12
48

I love asking people "how much is 1 plus 2 times 3", they often answer 9 which is wrong. resolve 2*3 first, then add 1.

2007-06-28 16:12:25 · answer #8 · answered by TechnoStuff 4 · 0 0

Let us restate the expression:
(5 * [9 + 3]) - (3 * 4)

Simplifications:
(5 * 12) - 12
60 - 12
48

2007-07-02 15:39:09 · answer #9 · answered by Jun Agruda 7 · 2 0

48

2007-06-28 16:32:39 · answer #10 · answered by Anonymous · 0 0

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