Plug in a -20 wherever you see a b
(-20)^2 +4*-20-89/13
400 + -80-89/13
400 - 169/13
400-13
=387
Hope this helps
AC=2AE ( because diagonal of rhombus bisect each others)
AE=8 cot 53°
AE=6
AC=2 x 6 = 12
Hence, The length of AC is 12
No B
lets say W is 5
C is saying 4x5+6 right?
so all 4 side are 5 and plus a random six
W is only equal to 2 sides so C and D are gone
A. 2 x 5 + 6 is saying
2 sides are 5 + 6 and then a missing side
but B is 2 x 5 + 12
B could also say 2 x 5 + 2 x 6
2 sides are 5 and then 6 side are 5
Your answer is B
-4/3x + 1/6 < 7/9
-4/3x < 7/9 - 1/6 7/9 - 1/6 = 42/54 - 9/54 = 33/54 = 11/18
-4/3x < 11/18
-x < 11/18 ÷ 4/3 11/18 ÷ 4/3 = 11/24
-x < 11/24
x > -11/24
