The area of a rectangle is equal to its length x width:

a = l x w
a = a x b
a = 7 x 8
a = 56

Parallel lines are lines that share the same slope (steepness) and therefore never intersect. A transversal occurs when a set of parallel lines are crossed by another line. All of the angles formed by a transversal are called interior angles and angles in the same position on different parallel lines equal each other (a° = w°, b° = x°, c° = z°, d° = y°) and are called corresponding angles. Alternate interior angles are equal (a° = z°, b° = y°, c° = w°, d° = x°) and all acute angles (a° = c° = w° = z°) and all obtuse angles (b° = d° = x° = y°) equal each other. Same-side interior angles are supplementary and add up to 180° (e.g. a° + d° = 180°, d° + c° = 180°).

You need to find the value of b so solve the first equation in terms of x:

-3b + x = -1
x = -1 + 3b

then substitute the result (-1 - -3b) into the second equation:

-8b + 7(-1 + 3b) = 9
-8b + (7 x -1) + (7 x 3b) = 9
-8b - 7 + 21b = 9
-8b + 21b = 9 + 7
13b = 16
b = \( \frac{16}{13} \)
b = 1\(\frac{3}{13}\)

You can only add or subtract monomials that have the same variable and the same exponent. For example, 2a + 4a = 6a and 4a² - a² = 3a² but 2a + 4b and 7a - 3b cannot be combined. However, you can multiply and divide monomials with unlike terms. For example, 2a x 6b = 12ab.

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, -8) and (2, 4) so the slope becomes: