What is the value of n in the equation below?

12

Step-by-step explanation:

We can use the property of exponents    over here.

Let's use this property to write:

This is equal to a^9, hence, n - 3 = 9. Let's solve for n:

n = 12

option C

12

Step-by-step explanation:

Given in the question an expression

To solve for n we will use rules of exponent

cross multiply

apply product rule

Apply logarithm on both sides of equation

apply power rule of logarithm

nln(a) = 12ln(a)

ln(a) will cancel out on each side so we are left with

n= 12

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".