Which number line represents the solution of 4x - 9 ≥ -21? what would the number line look like ?

Solve for x:

4x-9 >= -21

Add 9 to both sides:

4x >= -12

Divide both sides by 4:

X >= -3

The number line would have a solid dot on -3 with a line and arrow pointing to the right of -3

Steps to solve:

4x - 9 ≥ -21

~Add 9 to both sides

4x - 9 + 9 ≥ -21 + 9

~Simplify

4x ≥ -12

~Divide 4 to both sides

4x/4 ≥ -12/4

~Simplify

x ≥ 3

The number line will be in the picture below.

Best of Luck!

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".

addition

step-by-step explanation: