Answer:
cscA = 
Step-by-step explanation:
Using the identity
csc x =
, then
sinA =
=
=
=
, thus
cscA =
= 
<span>ABC =22° because AB and BC are congruent
</span>
Answer:
8 and 2/3
Step-by-step explanation:
Divide 6.5 by 0.75 and you get
, or 8 and 2/3
There is no solution for the first one
if you eliminate y you get 2 equations
-13x - 13z = -25
-13x - 13x = -15
- there is no solution to theses
a23 means the element in the second row and the 3rd column
so its -5
77 - (-145) = 77 + 145 = 222