Answer: In 1 hour, 12720 more times rabbit's heart beat than a dog's rabbits heart beat
Step-by-step explanation:
Since we have given that
Rabbit's heart beat in 1 min 212 times more than dog's heart beat in 1 min.
So, in 1 hour , we get,
So, in 1 hour, 12720 more times rabbit's heart beat than a dog's rabbits heart beat .
-r + 8(-5r -2).
Multiply 8 by -5r - 2
- r - 40r - 16.
Combine -r and -40r
-41r - 16 is a simplified equivalent expression of -r + 8(-5r - 2)
Answer:
-41r - 16
Step-by-step explanation:
-r + 8 (-5r - 2)
-r - 8*5 r -8*2
-r - 40r - 16
-41r - 16
Remark
Start by figuring this out for 1 car. Worry about the 7 part when you find 1.
This problem is used quite frequently in physics. For example resistors in parallel use the same equation.
Formula
1/frank + 1/carla + 1/missy = 1/ time taken to do 1 mar.
Givens
Frank = 2 hours
Carla = 2 hours
Missy = 3 hours.
Substitute and Solve
1/2 + 1/2 + 1/3 = 1/Three_together.
3/6 + 3/6 + 2/6 = 1/Three_together.
8/6 = 1/Three_together. Cross multiply
8 * Three_Together = 6*1
8 * Three_Together = 6 Divide by 8
Three_Together = 6/8 = 3/4 = 0.75 hours. or 45 minutes for 1 car
Seven Cars
For 7 cars multiply 0.75 by 7
7 * 0.75 = 5.25 hours. <<<< Answer
A. (–4, –1)
B. (–4, 0)
C. (–4, 1)
D. (–4, 2)
B.10/35 and 7/35
C.7/35 and 5/35
D.24/35 and 12/35