Answer:
25 kg.
Step-by-step explanation:
the dog is approximately 55 pounds and we know 1 kg is approximately 2.2 pounds. 55 divided by 2.2 is 25. the dog is approximately 25 kg.
Answer:
The pattern is that each time, 8 is added. The next 2 numbers are 47, 55.
Step-by-step explanation:
7+8=15
15+8=23
23+8=31
31+8=39
39+8=47
47+8=55
Answer: This is a problem of solving a system of linear equations. Let x be the speed of Jim in still waters, and y be the speed of the stream. Then we have:
{x+y=15/tx−y=9/t
where t is the time it takes Jim to go upstream or downstream. We can solve this system by adding the two equations and eliminating y:
2x=24/tx=12/t
Then we can substitute x into one of the equations and solve for y:
y=15/t−12/ty=3/t
Since we know that the speed of the stream is 2 mph, we can equate y to 2 and solve for t:
3/t=2t=3/2
Finally, we can plug in t into the expression for x and find the speed of Jim in still waters:
x=12/tx=12/(3/2)x=8
Therefore, Jim can go 8 mph in still waters.
Answer:
Time taken to go downstream = 4 / ( 2 + S) where S is the speed of the river
TIme taken to go upstream = 1 / ( 2 - S )
Since the time taken is the same in each case we can equate both of them
1 / ( 2 - S) = 4 / ( 2 + S )
2 + S = 8 - 4S
5 S = 6
S = 6 / 5
= 1.2 mph
an = one half(2)n − 1
an = 2(2)n − 1
an = 4(−2)n − 1
an = 2(one half)n − 1
Answer:
an = one half(2)n − 1
Answer:
Step-by-step explanation:
This problem is on rate.
firstly we have to find the rate at which 1 ton is sold
given that 3/8 ton is sold for $24
hence 1 ton will be sold for X
cross multiply
X = 24/3/8
inverse the denominator and multiply the result with the numerator we have
X= 24*8/3
X= $64
Now having found out that 1 ton cost $64
2 tons will cost =64*2
= $128
Therefore at this rate two tons will cost $128
Answer:128
Step-by-step explanation:
Answer:
B. -2 *4
Step-by-step explanation: