Use the linear combination method to solve the system of equations.
2a=6−2
2a+3b=16

and

Step-by-step explanation:

To solve the system of equations with the linear combination method, you must:

- Arrange the equations in a colum.

- Make one of the set of terms, with equal variables, opposite in signs but equal in coefficients.

- Add both equations to cancel out that set of terms.

- Solve for the the variable left.

- Substitute the value of that variable into one of the original equations and solve for the other variable to find its value.

As you can see, the first equation of the system of equations given in the problem, does not have the variable ,  so you can't apply the proccedure shown above. Then, to solve it you must:

-Solve for in the first equation:

- Substitute the value obtained into the second equation and solve for , then:

Therefore:

and

answer: it's d

step-by-step explanation:

when rotating a figure 180 degrees, imagine that you are able to take the figure and turn it clockwise or counterclockwise around a center point. to rotate a figure 180 degrees, you will need to apply the rule (x, y) → (-x, -y). start by using a coordinate grid with coordinates for each vertex of the figure. the center point of the coordinate grid is located at (0, 0), which is what you will rotate the figure around. write down the original coordinates of the shape you are going to rotate. then, apply the rule. for example, coordinate (1, 2) becomes (-1, -2). another example would be, coordinate (-4, -2) becoming (4, 2). after you change each original coordinate to the rotated coordinate, you will draw your new figure.

step-by-step explanation: