The coordinate grid is composed of a horizontal x-axis and a vertical y-axis. The center of the grid, where the x-axis and y-axis meet, is called the origin.

You need to find the value of a so solve the first equation in terms of y:

-3a + y = 4
y = 4 + 3a

then substitute the result (4 - -3a) into the second equation:

3a + 2(4 + 3a) = -3
3a + (2 x 4) + (2 x 3a) = -3
3a + 8 + 6a = -3
3a + 6a = -3 - 8
9a = -11
a = \( \frac{-11}{9} \)
a = -1\(\frac{2}{9}\)

A parallelogram is a quadrilateral with two sets of parallel sides. Opposite sides (a = c, b = d) and angles (red = red, blue = blue) are equal. The area of a parallelogram is base x height and the perimeter is the sum of the lengths of all sides (a + b + c + d).

To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.

3a⁵ - 9a⁵ = -6a⁵

To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.