Answer:
90 is your answer
Step-by-step explanation:
first I just added all similar numbers together, then I added the answers of all the similar numbers together one-by-one, finally we find our answer, 90
Answer:
73
Step-by-step explanation:
Since DA is the diameter, this means that you can divide the circle into two half-circles. You will solve with the right half-circle. A half-circle has a 180 total degrees. Add up the values given and solve for x.
(2x) + (7x - 4) + (85) = 180
2x + 7x - 4 + 85 = 180
9x - 4 + 85 = 180
9x + 81 = 180
9x = 99
x = 11
Now that you have the value of x, solve for m∠CZB.
m∠CZB = 7x - 4
m∠CZB = 7(11) - 4
m∠CZB = 77 - 4
m∠CZB = 73
Let angle = x
sinx = 43.2/72.5
=> x = 36.57 degrees
The entry in row 1, column 1 of 
is
(i.e. the dot product of row 1 of 
and column 1 of 
)
The entry in row 1, column 2 of is
The second option is the correct answer.
