2) I'm using r for rate .If it's 60km in 4h that means that 1/4=r/60 which means you can cross multiply it and it'd be 60=4r. If you divide 4 on both sides it would be 15=r. The rate is 15km and hour.
3) For this one, it's the same. You have to put 1/12=r/24 and cross multiply. It would be 24=12r then you divide both sides by 12 and you get 2=r.
4) It says d=r*t. For this problem, d=56 and r=8 if you substitute it you would have 56=8t and if you divide both sides by 8 you would have 7=t.
5) d=r*t. This means that if you substitute it, you would have d=25*160. 25*160=4000 so d=4000
What is the least common denominator between 5/6, 2/9 1/12, 3/8 5/9, 2/15
LCD is least common denominator, also called least common multiple LCM
5/6, 2/9 LCD is 18
1/12, 3/8 LCD is 24
5/9, 2/15 LCD is 45
18, 24, and 45 are the least common multiples of the denominators for their own pair.
A recipe that makes 1 serving calls for 0.25 L milk. How many servings can Rohit make if he uses 2 L of milk?
Use s for the number of servings.
Choose all answers that are correct.
A.0.25÷2=s
B.0.25×s=2
C.2÷0.25=s
D.s÷0.25=2
Answer:
20 seconds
Step-by-step explanation:
The distance to cover between the lead skater and trailing skater is 40 meters
The lead skater's rate is 12 m/s
The trailing one's rate is 14 m/s
So, we can say:
second skater is accelerating, or covering up the distance, in 14 - 12 = 2 m/s
So, at a rate of 2 meters per second, how long would it take to cover 40 meters??
We use the distance formula, substitute the known and solve for unknown.
Distance Formula = D = RT
Where
D is distance
R is speed/rate
T is time
We know
r = 2 m/s
d = 40 m
t = ?
Now,
D = RT
40 = 2t
t = 40/2
t = 20 (seconds)
Hence,
it will take 20 seconds for the second skater to catch up (pass)
The number which is equal to the multiplication of 243 and 6 is 1458.
Use the concept of multiplication defined as:
To multiply means to add a number to itself a particular number of times. Multiplication can be viewed as a process of repeated addition.
Here we have to determine:
243 times 6
It can be written as,
243 x 6
Now multiply the numbers 243 and 6,
2 4 3
x 6
1 4 5 8
Hence,
It is the product of 243 and 6 then 243 times 6 equals 1458.
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