Hello,
-5x-15>10+20x
==>-15-10>20x+5x
==>-25>25x
==>-1>x
==>x<-1
20 because 70+10=80 add 10 more it's 90 genius.
Answer:
44 students were in each bus.
Step-by-step explanation:
313-5=308/7=44
The formula is a+b divided by 2 times by height.
a and b are the two parallel sides of the trapezium.
The height is the perpendicular height of the trapezium.