Answer:
see explanation
Step-by-step explanation:
Her error is in squaring (2y)²
She has (2y)² = 2y²
when it should be 2y × 2y = 4y²
Then
(2y)² = 6² + 8²
4y² = 36 + 64
4y² = 100 ( divide both sides by 4 )
y² = 25 ( take square root of both sides )
y =
= 5
Answer:
7
Step-by-step explanation:
(x-2)^2
x^2-4x+4
-3^2-4(-3)+4=7
Answer:
<h2>560</h2>
Step-by-step explanation:
You must use a combination:

We have <em>n = 16</em>, <em>k = 3</em>.
Substitute:

100/66655*61364=<span>92.0621108694%</span>