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Bas_tet [7]
3 years ago
9

it takes perry 11 minutes to sweep a porch. Darryl can sweep the same porch in 10 minutes. Find how long it would take them if t

hey worked together
Mathematics
2 answers:
sdas [7]3 years ago
7 0

Answer:

hey hey

Step-by-step explanation:

zalisa [80]3 years ago
7 0

Answer:

21 minutes

Step-by-step explanation:

By the given numbers it would at least take them 20- 21 minutes.

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A survey of a group’s viewing habits over the last year revealed the following
Tom [10]

Answer:

0.52

Step-by-step explanation:

The computation of the percentage of the group in which none of the three sports watched is shown below:

= gymnastic percentage + baseball percentage + soccer percentage - gymnastic & baseball percentage - baseball & soccer percentage - gymnastic & soccer percentage + three sports percentage

= 0.28 + 0.29 + 0.19 - 0.14 - 0.12 - 0.18 + 0.08

= 0.48

Now the percentage is

= 1 - 0.48

= 0.52

7 0
3 years ago
Will someone help with this ! I was allowed a retry for it and I don’t know how to do it
pashok25 [27]

Answer:

\frac{dN}{dt}=k(725-N)\\separating the variables and integrating\\\int \frac{dN}{725-N}=\int kdt+c\\-log (725-N)=kt+c\\log (725-N)=-kt-c\\(725-N)=e^{-kt-c} =e^{-kt} *e^{-c} =Ce^{-kt} \\when t=0,N=400\\725-400=Ce^{0} =C\\C=325\\when t=3,N=650\\725-650=325e^{-3k} \\\frac{75}{325}=(e^{-k})^3\\\\e^{-k} =(\frac{3}{13}) ^{\frac{1}{3} } \\when t=5\\725-N=325(\frac{3}{13}) ^{\frac{5}{3} } =325*\frac{3}{13}*(\frac{3}{13} )^{\frac{2}{3}}\\N=725-75*(\frac{3}{13} )^{\frac{2}{3} }=725-28=697

Step-by-step explanation:

6 0
3 years ago
What should the following equation be multiplied by in order to eliminate the fractions?
Tems11 [23]
C. 6
Step-by-step explanation:
try multiplying everything by one of the numbers
(x/2)6 + (x/3)6 = (25/3)6
6x/2+ 6x/3 = 150/3
3x +2x = 50
8 0
3 years ago
Read 2 more answers
80 books to 64 books percent of change
Alecsey [184]

Answer:

-20%

Step-by-step explanation:

64 to 80⬇

((64 - 80 / 64)) × 100 = 25 %

Therefore, your answer would have to be: 25% since it increased

Or you can try going with this method as well

80 to 64 ⬇

((80 - 64 / 80 )) × 100 = -20%

Therefore, for that method your answer would be-20% because it decreased

5 0
3 years ago
Read 2 more answers
Find the derivative of F(x)=-x^4+4x^3+ 70 for 0<=x<=3
timofeeve [1]

Answer:

  -4x^3 +12x^2 for 0 < x < 3

Step-by-step explanation:

The power rule is appropriate:

  (d/dx)x^n = n·x^(n-1)

This is applied to each of the terms.

  F'(x) = -(4·x^3) +4(3x^2) +0

  F'(x) = -4x^3 +12x^2 . . . . for 0 < x < 3

__

The derivative is not defined at the endpoints of the interval, so F'(x) is only defined on (0, 3), not [0, 3].

8 0
3 years ago
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