3х + 7y = 8?
What describes the equation

Linear

Step-by-step explanation:

This equation is a linear equation. When you graph this  out, you will obtain a straight line as the equation.

Additionally, you can also tell that this is a linear equation since the highest degree is 1. If it were a quadratic equation for example, you would have x^2, or y^2, and the highest degree would be 2.  

Let me know if this helps!

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".

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70