Answer:
150
Step-by-step explanation:
0.80
Area of square = side^2
(2x+1)(2x+1) = (2x+1)²
= (2x)²+2·2x·1+1²
= 4x²+4x+1
Answer:a) 15,315
b) 1005
Step-by-step explanation: shown in the attachment
x < 1
x+9<10
Subtract 9 from each side
x+9-9<10-9
D
5:2::20:4::30:6::40:8
20/4 is 5
30/6 is 5
40/8 is 5