Answer:
r
=
1
,
0
Step-by-step explanation:
-7
+ 7r + 2 = 2
-7r(r-1)=2-2
-7r(r-1)=0
r-1=0
r=1
Answer:

Step-by-step explanation:
Given
The attached square
Required
Find BE
First, we calculate BD (the diagonal) using Pythagoras theorem.

Since the shape is a square, then

So:


Take square roots



BE is half BD.
So:



Answer:
t = 0.55 s and t = 1.14 s
Step-by-step explanation: