Answer:
16
Step-by-step explanation:
15x = 240 x stands for number of students at 1 table
To solve this we divide by 15 both sides for the "x" to remain alone on one side of the equality sign.
(15/15) x = 240/15
So, x = 16.
Number 3 is x=3 Number 5 is x=-1 Number 7 is x=9 Number 9 is x=10
7/20 is not equivalent to 1/3
sin A= 21/29
cos A=20/29
tan A=21/20
sin B =20/29