Try this option:
note, that distance between the parallel sides is shown via formula of area.
If it is possible, check the arithmetic.
ratio of adults to students can be written as a fraction
adult tickets / student tickets
140/210 can be simplified to 14/21
14/21 can be simplifed to 2/3
Answer:
x+2x+x+10
Step-by-step explanation:
Company A= x
Company B =2x
Company C =x+10