The area of the yellow region is
Start by expanding the first two brackets
(2+i)(3-i)
Multiply 2x3=6, then 2x I = 2i, then i x 3= 3i, then i x i= i2( i squared)
so it will be written as 6+2i+3i+i2( squared)
from here you can see that 2i and 3i can be added together to make 5i
so, 6+5i+i2(squared)
Then you bring in the third bracket from the question.
(6+5i+i2)(3+i)
6 x 3=18
6 x i= 6i
5i x 3=15i
5i x i=5i2(squared)
2x3=6
2x i= 2i
so you get 18+6i+15i+5i2(squared)+6+21
6i and 15i can be added together
18, 6 and 21 can be added together
so, 21i+5i2(squared)+45
23 the answer is Bbbbbbbbbbbbbbbbbbbb
<span>2x + 8y = –2 --------- (1)
5x + 6y = 9 </span>--------- (2)
(1) x 5 : 10x + 40y = -10 ----------- (1a)
(2) x 2 : 10x + 12y = 18 ----------- (2a)
(1a) - (2a) : 28y = -28
y = -1
Substitute y = -1 into (1)
2x + 8(-1) = –2
2x - 8 = -2
2x = 6
x = 3
Answer : (3, -1) (Answer A)
Step-by-step explanation:
162 kilometers = 162000 meters
1 hour = 3600 seconds.
162,000 meters/3600 seconds=45 meters/second=45 m/s
45*10=450