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svet-max [94.6K]
3 years ago
6

Which is equivalent to the expression?

Mathematics
1 answer:
Mariulka [41]3 years ago
5 0

Answer:

Step-by-step explanation:

1/2(13-5)+(4+8)^2

A. 148

B. 144

C. 20

D. 16

We must follow "PEMDAS" order of operations rules.  Anything inside parentheses must be done first, followed by exponentiation, multiplication and division, and finally additionl and subtraction.

1/2(13-5)+(4+8)^2 has three sets of parentheses enclosing mathematical expressions:  (1/2), (13 - 5) and (4 + 8).  These evaluate to:

                        1/2,       8,               12

and so we now have (1/2)(8) + (12)^2

Exponentiation is next.  We get:  (1/2)(8) + 144

Next is multiplication:                         4      + 144

Last is addition:                                       148

Answer A is correct:  148

8 x 9+4^2-(63/7)

is evaluated in the same way:

8 x 9+4^2-(9), followed by exponentiation:

8*9 + 16 - 9, followed by multiplication:

72 + 16 - 9 = 79 (Answer C)

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==========================================

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---------------------------

Method 1

List out the multiples of 6 and 8

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---------------------------

Method 2

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Method 3

Multiply the denominators 6 and 8 to get 6*8 = 48

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we can divide 48 over the GCF 2 to get 48/2 = 24, which is the actual LCM.

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