Daniel is enrolling for a test prep class. the expression below represents the hourly charges, including the cost for the materials. $30x + $65 1. the constant of the expression represents the a. cost of materials b. cost per hour c. number of hours 2. and the coefficient of x represents the__ a. cost per hour b. cost of materials c. number of hours

Step-by-step explanation:

The given expression is

This is a linear expression in slope-intercept form, where the constant ratio of change is 30, and the y-intercept is at y = 65.

Now, according to the problem, the expression represents the hourly charges, including the cost for the materials.

Therefore, the hourly charge is $30 per hour, where x represents hours, and the cost for materials is $65.

So, the answer to the first question is: A. cost of materials.

And the answer to the second question is: C. number of hours.

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 d

the answer is in the first quadrant, which make the y-int positive.

since the dots are going down, therefore the correlation is negative

i hope it is right.