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Please help me with 1 and 6 and please help me with a true or false if there wrong

Please help me with 1 and 6 and please help me with a true or false if there wrong-example-1
User Hexalys
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1 Answer

2 votes

Part 6

we have the expression


\lbrack6\cdot(4-2)+(21\cdot(2)/(3)+1)\rbrack+3^2

To solve this problem

Apply PEMDAS

P ----> Parentheses first

E -----> Exponents (Powers and Square Roots, etc.)

MD ----> Multiplication and Division (left-to-right)

AS ----> Addition and Subtraction (left-to-right)

that means

step 1

Parentheses first

(4-2)=2


21\cdot(2)/(3)+1

solve multiplication


\begin{gathered} (42)/(3)+1 \\ (45)/(3) \end{gathered}

substitute in the original expression


\lbrack6\cdot2+(45)/(3)\rbrack+3^2

Parentheses first again

multiplication


\begin{gathered} 6\cdot2+(45)/(3) \\ 12+(45)/(3) \\ (81)/(3) \end{gathered}

substitute


(81)/(3)+3^2

solve exponents first


\begin{gathered} (81)/(3)+9 \\ (108)/(3) \\ 36 \end{gathered}

Part 2

GCF of 14 and 42

we have

14=2*7

42=2*3*7

so

GFC=2

TRue

Part 3

GCF 16 and 56

16=2*2*2*2

56=2*2*2*7

GCF=8

TRue

Part 4

LCM of 12 and 9

12=2*2*3

9=3*3

LCM=4*9=36

true

Part 5

LCM of 12 and 6

12=2*2*3

6=2*3

LCM=12

false

User CherryNerd
by
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