Which operation should be done first to find the value of the expression: 18 + 5 x 42 = 2

Multiplication

Step-by-step explanation:

P = Parentheses

E = Exponents

M/D = Multiplication/Division

A/S = Addition/Subtraction

If you have both multiplication/division or addition/subtraction left, ALWAYS work left to right.

Since there are no parentheses or exponents you do the multiplication first

Multiply 5 x 42

Step-by-step explanation:

Remember the acronym PEMDAS

Parentheses

Exponents

Multiple

Divide

Add

Subtract

Because there are no parentheses or exponents you should multiply first.

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".

answer: i guess 5 units?

step-by-step explanation: