An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.

The area of a triangle is equal to ½ base x height:

a = ½bh
a = ½ x 6 x 6 = \( \frac{36}{2} \) = 18

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.

7a⁶ + 8a⁶ = 15a⁶

To solve this equation, isolate the variable for which you are solving (b) on one side of the equation and put everything else on the other side.

-4b + 7x = -2b - 8x + 8
-4b = -2b - 8x + 8 - 7x
-4b + 2b = -8x + 8 - 7x
-2b = -15x + 8
b = \( \frac{-15x + 8}{-2} \)
b = \( \frac{-15x}{-2} \) + \( \frac{8}{-2} \)
b = 7\(\frac{1}{2}\)x - 4

The slope-intercept equation for a line is y = mx + b where m is the slope and b is the y-intercept of the line. From the graph, you can see that the y-intercept (the y-value from the point where the line crosses the y-axis) is -1. The slope of this line is the change in y divided by the change in x. The endpoints of this line segment are at (-2, -4) and (2, 2) so the slope becomes:

Plugging these values into the slope-intercept equation:

y = 1\(\frac{1}{2}\)x - 1