A right angle measures 90 degrees and is the intersection of two perpendicular lines. In diagrams, a right angle is indicated by a small box completing a square with the perpendicular lines.

A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).

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

4a + y = 6
y = 6 - 4a

then substitute the result (6 - 4a) into the second equation:

-5a + 6(6 - 4a) = 2
-5a + (6 x 6) + (6 x -4a) = 2
-5a + 36 - 24a = 2
-5a - 24a = 2 - 36
-29a = -34
a = \( \frac{-34}{-29} \)
a = 1\(\frac{5}{29}\)

A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.

The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)² : a = π r².