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Roman55 [17]
3 years ago
7

John can mow a lawn in 80 minutes. Rocky can mow the same lawn in 120 minutes. How long does it take for both John and Rocky to

mow the lawn if they are working together?
Mathematics
1 answer:
mario62 [17]3 years ago
4 0

Answer: it will take them 48 minutes.

Step-by-step explanation:

John can mow a lawn in 80 minutes. This means that the rate at which he moans the lawn per minute is 1/80

Rocky can mow the same lawn in 120 minutes. This means that the rate at which Rocky can mow the same lawn per minute is 1/120

If they work together, they would work simultaneously and their individual rates are additive. This means that their combined working rate would be

1/80 + 1/120 = 200/9600 = 1/48

Assuming it takes t hours for both of them to clean the room working together, the working rate per hour would be 1/t. Therefore,

1/48 = 1/t

t = 48 minutes

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Ms santos seashells into 4 row she puts 6 seashells in each row how many seachells are there altogether
kati45 [8]
4 rows and 6 seashells in each row. 
Row 1: 0 0 0 0 0 0
Row 2: 0 0 0 0 0 0
Row 3: 0 0 0 0 0 0
Row 4: 0 0 0 0 0 0

You add all of them together 6+6+6+6=24 
Or you could do 6x4 and your answer would be 24
So the answer to the question is 24 seashells. 
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3 years ago
What is the best estimate foer 88 times 92
Pachacha [2.7K]
Around 8,100/8,000..
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3 years ago
URGENT! PLEASE ANSWER IF YOU ACTUALLY KNOW THE ANSWER!
Zepler [3.9K]

Answer:

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Step-by-step explanation:

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2 years ago
In a 45-45 right triangle, the two legs have the same length. in the figure(figure 4) both are given lengths of 1 . what is the
motikmotik
The hypotenuse formula is a^2+b^2=c^2
so each side a=1
                     b=1
                         1^2 +1^2=c^2
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7 0
3 years ago
Rectangle A has length 12 and width 8. Rectangle B has length 15 and width 10. Rectangle C has length 30 and width 15. Is Rectan
sergeinik [125]

Rectangles are similar figures, thus if scaled copies of each other then the ratios of corresponding sides must be equal

compare ratios of lengths and widths

rectangles A and B

k = \frac{12}{15} = \frac{4}{5} ← ratio of lengths

k = \frac{8}{10} = \frac{4}{5} ← ratio of widths

scale factors are equivalent, hence rectangle A is a scaled copy of B

rectangles C and B

k = \frac{15}{30} = \frac{1}{2} ← ratio of lengths

k = \frac{10}{15} = \frac{2}{3} ← ratio of width

scale factors (k ) are not equal, hence C is not a scaled copy of B

rectangles A and C

k = \frac{30}{12} = \frac{5}{2} ← ratio of lengths

k = \frac{15}{8} ← ratio of widths

the scale factors are not equal hence A is not a scaled copy of C


4 0
4 years ago
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