Meet in 2 hours
means that the distance covered over 2 hours adds to total distance which is 13miles
basically, imagine instead of moving in oposite directions, toward each other, imagine that one moves for 2 hours then theh other one moves for another 2 hours, total 13 miles
so
speed1=x
speed2=y
x is 2.1 more than y
x=2.1+y
distance=speed times time
time=2hours
speed=x and y
total distance=13
13=2x+2y
x=2.1+y
sub
13=2(2.1+y)+2y
13=4.2+2y+2y
13=4.2+4y
minus 4.2 from both sides
8.8=4y
divide both sides by 4
2.2=y
sub
x=2.1+y
x=2.1+2.2
x=4.3
the hikers hiked 2.2mph and 4.3mph
4x + x - 15 + 3 -8x = 13
Combine like terms:
(4x+x-8x) + (-15+3) =13
-3x-12 = 13
+12 +12
———————-
-3x = 25
— —-
-3 -3
X= -25/3
Answer:
im just saying your not explaining the question clearly
Step-by-step explanation:
Answer:
A.mean is 61.5 kg
B. 8 people
C. 17
Step-by-step explanation: