half a yard of ribbon divided by seven i think
Yes ofcourse I can help you!
Answer:
3
Step-by-step explanation:
All the triangles are similar, so ...
... 3/y = y/27 . . . . . ratio of short side to long side
... 81 = y² . . . . . . . . multiply by 27y
... 9 = y
The Pythagorean theorem tells you ...
... z² = 3² + 9² = 9 +81
... z² = 90 = 9·10
... z = √(9·10) = 3√10
Green Box: 3
Rewrite it in the form a^2 - b^2, where a = 5x and b = 8
(5x)^2 - 8^2
Use the Difference of Squares; a^2 - b^2 = (a + b)(a - b)
<u>= C. (5x - 8)(5x + 8)</u>