Consider those oxprossions. Expresion 1: 7(36 + 6) Expression 2: 49-21) Expreosion 3: 5(8 - 1) Artom applies the distributivo property to simplify the three expressions as shown below. He makes a mistako when simplifying ono oxprossion. Expression 1: 7(3f + 6) = 218 + 6 Expression 2: 4(9 - 2) = 36 - 8f Expression 3: 5(8 - ) = 40 - 5 in which expression did Artem make a mistako when simplifying? Expression What number is incorrect in the simplified form of that oxpression? What number should replace the incorrect number so that the expression is correctly simplified?​

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".

the answer is a.

step-by-step explanation:

in three games of golf, alex shot two under par four times.

step by step resolutions

1) n+n+1+n+2=51

3n+3=51

3n=48

n=16

the three numbers are 16, 17 and 18.

2) x+15=4x

3x=15

x=5

radha is now 5 years old

3) the two digits are x and y.

y=3x

(10x+y)+(10y+x)=88

y=3x

11x+11y=88

y=3x

x+y=8

x+3x=8

x=2

the original number can be either 28 or 82.

4) n+(n+2)+(n+4)=48

3n+6=48

3n=42

n=14

the numbers are 14, 16 and 18.

5) y=x+3

10y+x+10x+y=143

y=x+3

11x+11y=143

y=x+3

x+y=13

x+x+3=13

2x=10

x=5

the original number can be 57 or 75.

hope this !