Answer:
B
Step-by-step explanation:
Answer:
correct choice is B
Step-by-step explanation:
If d represents the number of desks in each row and the administrators want there to be 13 less rows than the number d of desks in each row, then the number of rows is d-13.
The total number of desks in all rows is

Due to space limitations, there should be fewer than 264 students in the cafeteria. Therefore,

We can solve for the value of x by applying the principles of sine and cosines method and laws of the inversed sign.
Given:
sin64°=cosx
Perform sin64° which is equal to 0.8987940463
0.8987940473=cosx
perform inverse sign:
cos-0.8987940473=x
x=26°
Therefore, the value of x is 26°.
3(21+15) is 3*21 and 3*15 which equal 63+45 which is 108 dollars