Answer: x=1, y=1, z=-1
Step-by-step explanation:
From the first and 3rd equation, 2x+9y=11.
The first equation is also 4x+16y-4z=24, so add that to the second equation, and you get 6x+27y=33.
Solving, we get x=1 and y=1, meaning that z=-1.
Answer:
slow hiker rate= 1.1mph and fast hiker rate= 5.5 mph
Step-by-step explanation:
lets consider the Speed of the slow hiker =x
Then Speed of fast hiker =x+4.4
As we know that distance is the product of speed and time
therefore,
Distance covered by slow hiker in 5 hours = 5x km
Distance covered by fast hiker in 5 hours=5 (x+4.4)=5x+22 km
As they are are 33 miles apart , therefore
5x + 5x+22 = 33
10x = 33-22
10x = 11
x =11/10 => 1.1
Rate of slow hiker is x i.e 1.1mph
Rate of fast hiker = x+4.4 => 5.5 mph
Answer:
30 friends
Step-by-step explanation:
40 * 0.75=30