What does it say In the speaker
1/4 2/8 3/12 4/16 5/20 6/24
A + b = 15 ..... eq 1
a – b = 12 ...... eq 2
So a = 15 – b
Substitute in eq 2 :
15 – b – b = 12
15 – 2b = 12
–2b = 12 – 15
b = 1.5
So a = 15 – 3/2 = 13.5
4ab = 4 x 13.5 x 1.5 = 81
6,824 rounded to the nearest ten is 6,820.
That is because 6,824 is closer to 6,820 than it is to 6,830.
The answer would be C.
HOPE THIS HELPS! ^_^
