Answer:

Step-by-step explanation:
<h3>to understand this</h3><h3>you need to know about:</h3>
<h3>tips and formulas:</h3>
<h3>let's solve:</h3>
- rewrite the given expression:(x)²-2.2x+(2)²
- (x-2)²
and
we are done
Answer:
Step-by-step explanation:
The top and bottom segments have same length.
a)
- n + n + 19 = 33
- 2n + 19 = 33
- 2n = 33 - 19
- 2n = 14
- n = 14/2
- n = 7
b)
- x + x + x + 3 = 30
- 3x = 30 - 3
- 3x = 27
- x = 27/3
- x = 9
Answer:
Decreased by 20%
Step-by-step explanation:
0.5 x ? = 0.4
? = 0.4/0.5
? = 0.8
1 - 0.8 = 0.2
0.2 = 20%
To check, 20% of 0.5 is 0.1. 0.5 - 0.1 is 0.4. So the answer is correct.