A total of 387 tickets were sold for the school play. They were either adult tickets or student tickets. The number of student tickets sold was two times the number of adult tickets sold. How many adult tickets were solds?

total number of tickets sold is 387

students tickets were two times that of adult which is 2x

adult is x

2x + x =387

3x=387

x=387/3

x=129

recall that adult is x

therefore adult is 129

to confirm the answer, remember that the student tickets sold is twice that of the adult. if adult is 129 then student ticket is 129 x2 which is 258 plus the number of adult ticket sold which is 129 the sum of the 258 and 129 is 387

i am sure it will be 90 degrees.

step-by-step explanation:

here you hope this .

step-by-step explanation:

hypotenuse = √(15² + 8²)

=  √(225 +64)

=  √(289) = 17

sin(x) = cos(y) = 8/17

they are identical so long as you are doing the sine of one angle and the cosine of the only other angle that isn't the right angle.