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2 False

3 3245000 in standard form ——> 3.24 x 10^6

4 GCF : 5
* 15 : 1 , 3 , 5 ,15
* 20 : 1 , 2 , 4 , 5 ,10 , 20
* 40 : 1 , 2 , 4 , 5 , 8 ,10 , 20 ,40

5 A: 193 + x = 256
256 – 193 = x
63 = x
B: 623 = x – 71
623 + 71 = x
694 = x

6 D- the exponent

7 NOT sure standard form

8 a prime number

9

10 ( 10 – 3^2 + 3 ) + 6^2 – 23
( 10 – 36 + 3 ) + 36 – 23
( 4 ) + 36 – 23
17

11 Letters that represent values

12 LCM : 168
24: 24 , 48 , 72 , 96 , 120 , 144 , 168
42: 42 , 84 , 126 , 168

13

14 B exponents

( Please Excuse My Dear Aunt Sally)
( Parenthesis Exponents Multiplication Division Addition Subtraction )

15 Standard Form ( 3.5 x 10^3 ) —–> ( 0.35 x 10^4 )

16 True Multiply , Divide , Subtract , or Add

17 a) a factor tree

Wish it helps.:)
References :