60.56ft
You can get this by creating right triangles with the adjacent side as 20 and using the angles given. You can then find the opposite sides using tangents and then simply add them together. <span />
Answer:6
Step-by-step explanation:
2+2= 4+2 = 6
1 . that’s it. That’s the simplest form I’m guessing.
Using FOIL (First Outside; Inside, Last), we find our product.
(7x - 3)(7x + 3) // Given
7x * (7x + 3) // First Outside
49x^2 + 21x // Distribute (remember this)
-3 * (7x + 3) // Inside Last
-21x - 9 // Distribute (remember this)
49x^2 + 21x - 21x - 9 // Add both answers (the one from Outside and the one from Inside)
49x^2 - 9 // Simplify. This is your answer
You can do this, or you can remember that this is a factor for a difference of squares, where
a^2 - b^2 = (a + b)(a - b)
Plug in “7x” for a, “3” for b
