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3 years ago

56. If 6 men plough a field in 10 hours, how many hours will it take 4 men to do the same work? (Assuming they are

Mathematics

2 answers:

Aneli [31]3 years ago

8 0

Answer:

15 hours, or B

Step-by-step explanation:

6 men - 10

12 men - 5

4 men - 15

Please mark as brainliest

Usimov [2.4K]3 years ago

7 0

Answer:

15 hours

Step-by-step explanation:

10/6 ≈ 3.7

4 * 3.7 = 14.8

-round it up-

14.8 ≈ 15

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Which car can travel at the slowest rate? Plz help fast

grigory [225]

Answer:

Step-by-step explanation:

Let's find unit rate of each (number of miles traveled in 1 hour). For that we will divide the distance by time to get the unit rate.

Note: $rate=\frac{Distance}{Time}$

(A)

rate = $\frac{300}{4}=75$ mph (miles per hour)

(B)

rate = $\frac{450}{6}=75$ mph

(C)

rate = $\frac{750}{10}=75$ mph

(D)

rate = $\frac{800}{12}=66\frac{2}{3}$ mph

As we can see, the first 3 rates are same, 75 mph, and the last one is $66\frac{2}{3}$ mph. So clearly, the last rate is the slowest.

D is the right answer.

7 0

3 years ago

Read 2 more answers

Solve for x. x3 = 216

vampirchik [111]

I'm assuming the equation is x^3 = 216 or $x^3 = 216$ (both mean the same thing)

If so, then the solution to x^3 = 216 is x = 6

We can find this by taking the cube root of both sides
x^3 = 216
x = 216^(1/3) .... 1/3 power means cube root
x = 6

Checking the answer:
x^3 = 216
6^3 = 216
6*6*6 = 216
216 = 216
Answer is confirmed

So once again the answer is x = 6. This is assuming the initial assumption made at the top of the problem holds up.

7 0

3 years ago

Read 2 more answers

What is the range of the relation? {(1, 2), (2, 4), (3, 2), (4, 6)} A.{2, 4} B.{1, 2, 3, 4, 6} C.{2, 4, 6} D.{1, 2, 3, 4}

tamaranim1 [39]

$(1)\ \ \ \ range:\ \ \ \{2, 4, 6\}\ \ \ \Rightarrow\ \ \ Ans.\ C\\\\(2)\ \ \ function:\ \ \ \{(1, 2); (2, 2); (3, 2); (4, 2)\}\ \ \ \Rightarrow\ \ \ Ans.\ D\\\\(3)\ \ \ f(4)=2-3\cdot4=2-12=-10\ \ \ \Rightarrow\ \ \ Ans.\ C\\\\(4)\ \ \ direct:\ \ \ y=ax\ \ \ \Rightarrow\ \ \ y= \frac{1}{3} x\ \ \ \Rightarrow\ \ \ Ans.\ B\\\\(5)\ \ \ f(x)=ax\ \ \ and\ \ \ f(4)=12\\.\ \ \ \ \ \Rightarrow\ \ \ 12=a\cdot4\ \ \ \Rightarrow\ \ \ a=3\ \ \ \Rightarrow\ \ \ f(x)=3x\ \ \ \Rightarrow\ \ \ Ans.\ (?)\\\\$

$(6)\ \ \ f(x)=ax^2\ \ \ and\ \ \ f(2)=48\\.\ \ \ \Rightarrow\ \ 48=a\cdot2^2\ \ \Rightarrow\ \ a=48:4=12\ \ \Rightarrow\ \ f(x)=12x^2\ \Rightarrow\ \ Ans.\ C\\\\(7)\ \ \ inversely:\ \ \ f(x)= \frac{a}{x} \ \ \ and\ \ \ f(2)=4\\.\ \ \ \Rightarrow\ \ \ 4= \frac{a}{2} \ \ \ \Rightarrow\ \ \ a=4\cdot2=8\ \ \ \Rightarrow\ \ \ y= \frac{8}{x}\ \ \ \Rightarrow\ \ \ Ans.\ B$